DE2640425A1 - ADJUSTMENT MECHANISM FOR A VEHICLE SEAT - Google Patents

Description

Patent attorneys Dipl.-lng. Cu rt whale laughs Dipl.-Ing. Günther Koch Dipl.-Phys. Dr Tino Haibach Dipl.-Ing. Rainer Feldkamp

D-8000 Munich 2 Kaufingerstraße 8 Telephone (0 89) 24 02 75 Telex 5 29 513 wakai d

ff date:

"Our reference: I5 6 ^ 4 - Fk / Ne

Cox of Watford Limited Nottingham / England

Adjustment mechanism for a vehicle seat

The invention relates to an adjustment mechanism for a vehicle seat, with the help of which the vehicle seat, for example the front seat in a passenger car is adjustable in the longitudinal direction.

The object of the invention is to provide an adjustment mechanism of this type in which the user can adjust the seat to a desired forward position and in which the seat can be pushed forward to give a person access to the rear seats of the vehicle to allow, whereupon the seat can be pushed back again and the adjustment mechanism automatically locks itself again in the previously set position. The adjustment mechanism should thus have, so to speak, a “memory for the adjustment position ¹¹ in the longitudinal direction.

An adjustment mechanism for a vehicle seat constructed in accordance with the invention comprises a pair of cooperating slide rails with a latch for holding these slide rails together in one of a number of positions of relative adjustment in the longitudinal direction, a handle to release the bolt

709816/0742

2640A2S

and alternative means for releasing the latch while a storage means is locked in a longitudinal position remains to said one position of relative longitudinal adjustment save.

Preferably, the alternative means can release the bolt without operating the handle and they can, for example operated by a tilting seat back that tilts forward to provide access to the rear seats of the To enable the vehicle, this process can automatically enable the forward movement.

The memory device may have a different locking position for each of the number of positions of the relative fore-and-aft adjustment have and this storage device can be attached to the handle or a part thereof form.

A foldable seat back can be connected to the handle and designed so that when the backrest is tilted forward and the latch is released, tilting the seat back forwards automatically from forward movement of the seat is accompanied. The handle can therefore be effective in two different ways: On the one hand, it can be operated in such a way that that it allows a different position in the longitudinal adjustment, while on the other hand the handle remains fixed by the storage device relative to the chassis of the vehicle while the seat is in the forward direction can move with respect to the handle.

According to a preferred embodiment, the handle is a transverse crosspiece that extends under the front of the seat and arms that extend rearward which are coupled to the same adjustment mechanisms on each side of the seat.

70981 6/0742

Further advantageous refinements and developments of the invention emerge from the subclaims.

The invention is explained in more detail below with reference to an exemplary embodiment shown in the drawing.

The drawing shows a partially sectioned side view of a seat attachment in a vehicle.

The seat attachment has an inner slide rail 11, the is attached to the floor of the vehicle, as well as an outer slide rail 12, which extends in the longitudinal direction along the inner slide rail 11 can slide to adjust the longitudinal position of the seat. The seat frame 13 is with the upper slide 12 screwed over vertical columns 14.

The slide rails 11 and 12 are normally connected to one another in a selected position of longitudinal adjustment locked with the aid of a blade 15 on a lever 16, the pivotable at 17 on the side of the outer slide rail 12 is attached, the blade extending through a groove in the outer slide rail and a selected groove of a number of corresponding grooves in the inner slide, one of which is shown at 18. A compression spring 19 holds the lever 16 normally in a position in which the blade 15 is indented as shown in the drawing.

A backrest 21 is pivotally connected to the seat frame at 22 so that the angle of inclination of the backrest is adjusted can be. The mechanism for adjusting the backrest can be designed as in the German Offenlegungsschrift 2 228 239 is described, in which a pawl 23 with A manual lever (not shown) is released so that the backrest can be adjusted, whereupon the latch 23 is re-indented.

709816/0742

2840425

On the underside of the backrest frame is a forward and downward extending tab 24 which a cross pin 25 carries.

To adjust the desired longitudinal position of the seat, the user lifts a rod 26 that extends transversely from side to side of the seat just below the leading edge the upholstery extends. The rod 26 has the shape of a U in plan view, with an arm 27 on each side extends rearwardly within the slide rails 11 and 12 to a vertical plate 28 which has a V-shaped slot for Has receptacle of the pin 25. The V-shaped slot has a vertical slot portion 29 that allows vertical movement the plate 28 opposite the pin 25 allows, and an upwardly and rearwardly inclined slot part 31, which it allows pin 25 to push plate 28 downward, as will be explained in more detail below.

The rod 26 is normally in its fore-aft position defined by means of one of a number of holes along the bottom of the rearwardly extending arms that come with a pin 33 engaged on the inner slide is attached and thus set with respect to the floor of the vehicle. The vertical pin 33 is located on a cross bar 3 ^ and a spring extends from that Pin 33 around crossbar 34 and forward and up at 35 to a plastic roller 36 which can slide along the top of the arms 27.

Therefore, when the rod 26 is raised, the spring 35 is deflected and the arm 27 comes out of engagement with the pin 33 and it can be pivoted about a cross bar 37, which with the top of the outer slide rail 12 is welded so that the rear end of the arm 27, which carries the plate 28, moves down as far as the vertical portion 29 of the V-shaped slot allows and a transverse tongue

• 709816/0742

'38 on lever 16 is pushed down to release blade I5 to be brought out of engagement with the groove 18.

The outer slide rail 12 and the complete seat carried thereby can then be freely longitudinally on the inner slide rail 11 slide until the rod 26 is released at a selected position and falls down under the action of the spring 35, so that the blade 15 in the next slot 18 in the inner Slide rail engages. A hole in the arm 27 continues to engage the pin 33 · The seat is then at its new one Longitudinal position blocked.

If someone wants to get on the rear seat of the vehicle, it is necessary to tilt the backrest21 forward and correspondingly, the pawl 22 is disengaged and the backrest is tilted forward about the pivot point 22. The pen 25 moves down and back about axis 22 to the position shown at 25 'in which plate 28 has been lowered, to disengage the blade 15 from the groove 18; the pin 25 is then at the rear end of the inclined Part 31 of the V-shaped groove. The rod 26 and the arm 27 are fixed in the longitudinal direction by the pin 33 which is attached to the The vehicle floor is fixed and the downward movement of the plate 28 takes place as a result of the pivoting of the arm 27 down around pin 33.

When the blade 15 has been disengaged from the inner slide, the outer slide rail can move in the longitudinal direction on the inner slide rail, with a pivoting movement at the same time of the arm 27 around the pin 33 and pivoting the backrest 21 occurs around the axis 22 with respect to the seat frame 13. The seat moves forward when the backrest moves forward is tilted so that maximum space is available for access to the rear seats of the vehicle. .

When the Sitx is returned to its normal position, the backrest 21 is tilted backwards about the axis 22,

709816/0742 ./.

until the pawl 23 is re-engaged and the backrest is in its preset pivot position relative to the seat frame 13 holds. The pin 25 then returns to that shown at 25 ' Position at the rear end of part 31 of the V-shaped slot return. The blade 15 must have returned to its original position because the position of the plate 28 is longitudinal is determined by the pin 33 and well the position of the pin

25 fixed on the backrest through the V-shaped slot is. The backrest is then returned to its original inclined position, so that the seat frame 13 is in its original position Longitudinal position must be located, together with the outer slide rail 12 and the lever l6, which is articulated on it is attached and the blade 15 carries.

As soon as the pin 25 leaves the part 31 of the V-shaped slot the spring 35 acts again in the direction of lifting the plate 28 so that the blade 15 is in the same groove 18 can engage in the inner slide rail; in this way the initial situation is restored and the mechanism has "saved" the previously selected position in the longitudinal direction.

It will be understood that while only one slide has been described in detail, like slide rails on each Side of the seat frame are provided, each with one of the two rearwardly extending arms 27 on the rod

26 are coupled. It would be possible to use the adjustment mechanism to be provided only on one side, but a double mechanism is preferable for reasons of ease.

It should also be noted that when the user changes the selected longitudinal position and the rod 26 raises against the action of the spring 35, the rod 26 moves forward with the seat and the arm 27 can move under the Move roller 36.

709816/0742

AO

For the sake of simplicity, the mechanism can be supplied in three parts, namely a left slide assembly, a right slide rail assembly and the rod 26 with the associated arm parts, the two slide rail assemblies be fixed in the usual manner on the floor of the vehicle, whereby the cross member or rod 26 thereby is brought into place with each rearwardly extending arm 27 between two spaced apart arms the spring 35 is pushed until the plate 28 is in the vicinity of the pin 25 is located, whereupon the plate springs inward, so that the pin 25 engages in the V-shaped slot. The roller 36 is then in place at the front end of the spring locked.

Claims;

709816/0742

Blank page

Claims (10)

Patent claims: 1. Adjustment mechanism for a vehicle seat, with the help of which ν ^ Öer vehicle seat, for example the front seat in a passenger car, is adjustable in the longitudinal direction, with a pair of cooperating slide rails and a latch for Holding these slide rails together in one of a number of positions of relative longitudinal adjustment and with a handle to release the bolt, g e ke η η ze i without t through alternative devices (24) for Loosen the bolt (15 * 18) during the locked state a storage device (27, 33) which is blocked in the longitudinal direction to the said one position of the relative To save the setting in the longitudinal direction. 2. Adjustment mechanism according to claim 1, characterized in that the alternative devices (24) release the latch (15, 18) in response to the forward tilting of the backrest (21) which is pivotally attached to the seat is. 3. Adjustment mechanism according to one of the preceding claims, characterized in that the storage device has a different blocking position for each of the number of longitudinal adjustment positions. 4. Adjustment mechanism according to claim 3, characterized in that the storage device is a pen (33) or a groove on the handle or a fixed one of the slide rails (11) as well as a number of grooves or one Number of pins on the fixed slide or handle (27). 709816/0742 5. EinstelimechanIsmus according to one of the preceding claims, characterized in that the tiltable backrest (21) is coupled to the handle (26) in such a way that a forward tilting of the backrest (21) releases the bolt (15 * 18) and at the same time releases a forward movement of the Seat causes while the memory device (27, 33) remains indented. 6. Adjustment mechanism according to claim 5, characterized in that the coupling between the backrest (21) and the handle (26) includes a pin-and-slot connection (25, 31) which is designed such that, if the backrest is tilted forward, the slot (31) and the pin (25) cooperate and release the latch (15, 18) and hold it released as long as the backrest (21) remains tilted forward 7. Adjustment mechanism according to claim 6, characterized in that during the release of the bolt (15, 18) by operating the handle (26) the pin can move in the slot so that the backrest is not affected will. 8. Adjustment mechanism according to claim 6 or 7, characterized in that when the handle (26) the Latch (15, 18) releases, the handle together with the backrest tilts around the pin / slot connection, while if the The backrest is tilted forward, the handle tilts around the blocked storage device (27, 33). 9. Adjustment mechanism according to one of the preceding claims, characterized in that the handle has a transverse part (26) which extends under the front edge of the seat (13) and has rearwardly extending arms (27) with the same adjustment mechanism are coupled to each side of the seat. 709816/0742 10. adjustment mechanism according to claim 9, characterized in that the handle with dsm adjustment mechanism is coupled via a releasable snap-in connection (24, 25, 28). 709816/0742