Land vehicles: bodies and tops – Bodies – Seats with body modifications
Patent
1994-05-26
1996-06-25
Mitchell, David M.
Land vehicles: bodies and tops
Bodies
Seats with body modifications
248421, 29734415, B60N 204
Patent
active
055293646
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a motor vehicle seat with means for vertical and longitudinal adjustment.
BACKGROUND ART
Conventional longitudinal adjustment devices of motor vehicle seats are composed of slide rails. Such slide rails have numerous drawbacks. They necessitate a high degree of finishing work. It is also difficult to adhere to the required tolerances.
SUMMARY OF THE INVENTION
The present invention is based on the object of providing a motor vehicle seat of the known type, which permits both a vertical adjustment as well as a longitudinal adjustment using simple means.
This object is achieved by a motor vehicle seat with means for vertical and longitudinal adjustment, in which a holder is guided by guide rods which can pivot in parallel and are pivotally connected to pivot points which are rigidly fixed to the car body, the holder supporting two short guide rods, the other ends of which are, in turn, pivotally connected to the seat frame and the bottom ends are directed in an upward direction, the short guide rods being pivotally connected between the lends of the long guide rods. The short guide rods may be pivotally connected to the center of the long guide rods. The upwardly directed bottom ends of the long guide rods may be guided in an upward direction by means of guide rods which are directed in divergent directions from a common pivot point on the holder. The spacing between the pivot points of the long guide rods on the seat frame conveniently substantially corresponds to the spacing between the pivot points of the short guide rods on the holder. The spacing between the top pivot point of the long guide rods and the pivot point of the short guide rods may be equal to the spacing between the two pivot points on the holder. The bottom hinge points of the long guide rods may be guided at least substantially parallel to each other.
The above device according to the present invention is economical and relatively light-weight, when compared to known adjustment devices.
BRIEF DESCRIPTION OF THE DRAWING
The invention is described hereinafter in detail with reference to the drawing, in which:
FIG. 1 shows a diagrammatic arrangement of the present invention seat in a forward end position; and
FIG. 2 shows the seat according to FIG. 1 in a rear end position.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
Two guide rods 7 and 8 are pivotally connected to two bearing points 5 and 6 which are rigidly fixed to the car body. The front hinge points 10 and 11 of the guide rods 7, 8 support a triangular holder 9. The triangular holder 9 comprises three hinge points 10, 22 and 24 which are arranged in the corners of an isosceles or equal-sided triangle.
Short guide rods 21 and 23 which, in turn, are connected to long guide rods 13 and 19, respectively, via hinge points 14 and 20, project from the hinge points 22 and 24. The upper ends of the long guide rods 13 and 19 are pivotally connected to the hinge points 12 and 25 on the frame 3 of the seat. The seat frame 3 supports the seat upholstery 1. The backrest support 4, comprising the backrest upholstery 2, is pivotally connected to the seat frame 3.
The long guide rods 13 and 19 are directed upwardly from their lower hinge points 15 and 18. In the illustrated exemplified embodiment, the approximate parallel guiding is provided by means of the guide rods 17 and 16 which are pivotally connected to the hinge point 10 of the holder 9.
It is also possible to direct the hinge points 15 and 18 in an upward direction along corresponding optionally linear and parallel or curved and parallel path.
The relevant guide rods for the vertical adjustment are the fixedly hinged guide rods 7 and 8. They transmit their pivoting movement to the holder which, via the guide rods attached thereto, conjointly moves the seat frame in an upward or downward direction.
The functioning of the longitudinal adjustment becomes clear if, in this instance, the holder 9 is visualized in a fixed predetermined position.
The short guide rods 21 and 23 pivot
REFERENCES:
patent: 2942647 (1960-06-01), Pickles
patent: 3022035 (1962-02-01), Pickles
patent: 3037735 (1962-06-01), Matthews
Mitchell David M.
Robinson Kia M.
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