A longitudinal guide for vehicle seats, including two elongate rails, each including a lower rail, an upper rail supported on the lower rail and displaceable in a longitudinal direction, and two bearing areas for guiding means, the bearing areas lying diagonally opposite to and biased against each o
A longitudinal guide for vehicle seats, including two elongate rails, each including a lower rail, an upper rail supported on the lower rail and displaceable in a longitudinal direction, and two bearing areas for guiding means, the bearing areas lying diagonally opposite to and biased against each other, each upper rail and lower rail having an L-shaped region, if viewed in profile, formed by a base leg and an L-leg protruding from the base leg substantially perpendicularly, and two end regions adjoining the L-shaped region, each end region of the upper or lower rail together with the end region of the associated lower or upper rail forming an embracing area by mutually hooking, the end regions of the upper rail forming the bearing areas with opposite portions of the associated lower rail, and a plurality of balls being supported in a first bearing area on the end region.
대표청구항▼
1. A longitudinal guide for seats of motor vehicle seats, comprising two elongate rails, each of said rails comprising a lower rail, an upper rail supported thereon so as to be movable in a longitudinal direction, andtwo bearing areas for guiding means, which are disposed diagonally opposite to each
1. A longitudinal guide for seats of motor vehicle seats, comprising two elongate rails, each of said rails comprising a lower rail, an upper rail supported thereon so as to be movable in a longitudinal direction, andtwo bearing areas for guiding means, which are disposed diagonally opposite to each other and biased against each other,each upper and lower rail havingan L-shaped region, if viewed in profile, which is formed by a base leg and an L-leg projecting from the base leg essentially perpendicularly, andtwo end portions which are respectively connected to the L-shaped region, whereineach end portion of the upper or lower rail together with the end portion of the associated lower or upper rail forms an embracing area under mutual interlocking,the end portions of the upper rail together with opposite portions of the associated lower rail form the bearing areas, anda single group of guiding means, which consists of a plurality of balls, is supported in a first bearing area,whereinthe first bearing area is formed by a corner area of the lower rail and by the end portion of the upper rail, which is formed as a circular arc-shaped profile,a first connecting leg projects outwardly from the L-leg of the L-shaped region of the lower rail,the first connecting leg is followed by a second connecting leg, which extends obliquely upwards and outwards of the rail,the corner area is formed on the second connecting legthe end portion of the upper rail, which is formed as a circular arc-shaped profile, is connected with a bent portion of the upper rail, which is connected with the base leg of the upper rail, andthe bent portion of the upper rail is spaced apart from and opposite to the first connecting leg, for directly supporting the bent portion of the upper rail on the first connecting leg in the event of a crash. 2. The longitudinal guide as claimed in claim 1, wherein the first connecting leg projects obliquely upwardly from the L-leg of the L-shaped region of the lower rail and outwards from the rail. 3. The longitudinal guide as claimed in claim 1, wherein the first connecting leg of the L-shaped region of the lower rail projects obliquely downwardly from the L-leg of the L-shaped region of the lower rail and outwards from the rail. 4. The longitudinal guide as claimed in claim 1, wherein the first connecting leg of the L-leg of the L-shaped region of the lower rail projects horizontally and outwards from the rail. 5. The longitudinal guide as claimed in claim 1, wherein in a transition area between a connecting leg opposite to the L-leg of the upper rail and the adjoining end portion, which is formed as a circular arc-shaped profile, a predetermined bending position is provided which is less stiff than the bent portion of the upper rail adjacent thereto. 6. The longitudinal guide as claimed in claim 5, wherein at least one bent portion of the upper rail is provided with an embossment formed by cold work forming to effect a higher stiffness, said embossment(s) being formed with an even curvature. 7. The longitudinal guide as claimed in claim 6, wherein a corner area of the L-shaped region of the upper rail and a transition area between a slanted connecting leg, which adjoins the connecting leg opposite to the L-leg of the upper rail, and the circular arc-shaped end portion of the upper rail are each provided with an embossment. 8. The longitudinal guide as claimed in claim 7, wherein the slanted connecting leg extends obliquely upwards and outwards from the rail and wherein the transition area between the obliquely downwardly and outwardly extending connecting leg and the end portion of the upper rail, which is formed as a circular arcuate profile, is formed as a bent portion, which lies substantially on a virtual center line through the L-leg of the L-shaped region of the lower rail projecting substantially vertically from the base leg. 9. The longitudinal guide as claimed in claim 6, wherein the slanted connecting leg extends obliquely downwards and outwards from the rail, and wherein the transition area between the obliquely downwardly and outwardly extending connecting leg and the end portion of the upper rail formed as a circular arc-shaped profile is formed as a bent portion. 10. The longitudinal guide as claimed in claim 9, wherein the bent portion lies substantially on a virtual center line through the L-leg of the L-shaped region of the lower rail projecting substantially perpendicularly from the base leg or lies on an opposite side of a virtual center line through the L-leg of the L-shaped region of the lower rail, if viewed from an inner space of the rail. 11. The longitudinal guide as claimed in claim 9, wherein the upper rail is bent by about 180 degrees at the bent portion, and substantially reverses the direction of extension. 12. The longitudinal guide as claimed in claim 9, wherein the bent portion is spaced apart and opposite to the center of the first connecting leg for support in the event of a crash. 13. The longitudinal guide as claimed in claim 9, wherein a guide web is provided on the inner side of the L-leg of the upper rail, a front free end of which is bent at an acute angle relative to the guide web and passes into a supporting portion, a front end face of which extends in parallel with and, in a normal state, at a small distance to the slanted connecting leg of the upper rail, which is followed by the bent portion. 14. The longitudinal guide as claimed in claim 13, wherein openings are formed in the guide web through which locking pins of a latching and locking device extend, wherein front free ends of the locking pins are engaged with locking openings to define the longitudinal position of the upper rail with respect to the lower rail. 15. The longitudinal guide as claimed in claim 14, wherein the locking openings are formed in the base leg of the lower rail or in a locking web, which extends in the longitudinal direction and is disposed in the interior space of the rail profile, which is fixed to the base leg of the lower rail by means vertical connecting webs laterally disposed. 16. The longitudinal guide as claimed in claim 1, wherein the corner area is formed by the second connecting leg and an upper connecting leg angled from the second connecting leg. 17. The longitudinal guide as claimed in claim 16, wherein the second connecting leg and the upper connecting leg enclose an angle in the range from 100 degrees to 120 degrees, more preferably an angle in the range from 112.5 degrees to 107.5 degrees, and more preferably an angle of about 110 degrees, and wherein a rounded inner corner is formed on an inner side of the corner area the radius of curvature of which is matched to the radius of curvature of the balls mounted in the first bearing area. 18. The longitudinal guide as claimed in claim 1, wherein contact points of the balls at the end portion formed as a circular arc-shaped profile are on an opposite side of a virtual center line through the L-leg of the L-shaped region of the lower rail, if viewed from an interior space of the rails. 19. The longitudinal guide as claimed in claim 18, wherein the distance between the contact points to the virtual center line is less than a material thickness of the upper rail or corresponds to this material thickness. 20. The longitudinal guide as claimed in claim 18, wherein the contact points further lie on a virtual extension line of the outer side of the L-leg of the L-shaped region of the lower rail or lie outside of this virtual extension line, if viewed from an interior space of the rails. 21. The longitudinal guide as claimed in claim 20, wherein the distance of the contact points to the virtual extension line is considerably less than a material thickness of the upper or lower rail. 22. The longitudinal guide as claimed in claim 1, wherein all clearances in the embracing areas of the bearing areas in a direction perpendicular to the base leg of the L-shaped region of the lower rail are the same and are less than a material thickness of the upper rail. 23. The longitudinal guide as claimed in claim 1, wherein all clearances in the embracing areas of the bearing areas parallel to the base leg of the L-shaped region of the lower rail are the same and are less than a material thickness of the upper rail. 24. The longitudinal guide as claimed in claim 1, wherein a top surface of the base leg of the L-shaped region of the upper rail protrudes from an upper reversal area of the lower rail in the embracing area of the first bearing area by a predetermined distance, which is less than twice the material thickness of the upper rail in an unloaded state of the longitudinal guide. 25. The longitudinal guide as claimed in claim 1, wherein a plurality of first rollers, which are supported between the base leg of the L-shaped region of the lower rail and an opposite supporting leg of the upper rail extending in parallel thereto, and a plurality of second rollers are supported in the second, diagonally opposite bearing area, which are supported between the end portion of the upper rail formed as a supporting leg extending at an acute angle obliquely upwardly and an opposite inclined supporting leg extending in parallel between a connecting leg adjoining the base leg of the lower rail and extending vertically upwardly and a horizontal base leg of the embracing area in the end region of the lower rail connected therewith. 26. The longitudinal guide as claimed in claim 25, wherein the base leg of the embracing area in the second bearing area is connected with a connecting leg, which is substantially perpendicular to the base leg of the L-shaped region of the lower rail, a bent portion and a free end of the lower rail, which is substantially perpendicular to the base leg of the L-shaped region and is projecting downwardly. 27. The longitudinal guide as claimed in claim 1, wherein said base leg of the lower rail merges into a connecting leg bent at a right angle below the base leg of the upper rail, which passes over into a supporting leg extending in parallel with the base leg and serves for bearing the rollers in the second bearing area, whereby a free space is formed below the base leg of the lower rail. 28. The longitudinal guide as claimed in claim 1, wherein said base leg of the lower rail is interrupted in the transverse direction to thereby form a free space, wherein the free space bridged by a connecting web at least in a central portion of the rails, which connecting web is fixed at the two ends of the base leg. 29. The longitudinal guide as claimed in claim 28, wherein the connecting web is formed of a harder material than the base leg of the lower rail. 30. The longitudinal guide as claimed in claim 1, wherein the lower base leg is overlapping with two mutually overlapping stationary base legs, which are in full contact with each other, wherein the base member are fixedly connected to each other.
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이 특허에 인용된 특허 (22)
Lagerweij, Richard Allen, Automotive seat track lock mechanism with positive engagement.
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