Supports – Stand – Horizontally movable support surface
Patent
1989-02-27
1990-06-26
Talbott, David L.
Supports
Stand
Horizontally movable support surface
297344, F16M 1300
Patent
active
049365355
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement for a vehicle seat which is designed displaceable in the longitudinal direction along at least one rail fixed in the vehicle, there being arranged between the vehicle seat and the rail a locking mechanism which releaseably locks the position of the vehicle seat relative to the rail.
It is known to improve the comfort of those travelling in a vehicle by designing the vehicle seats so that they are displaceable in the longitudinal direction in the compartment area of the vehicle. A mechanism for longitudinal displacement which is commonly used for this purpose comprises two elongate, parallel rail mechanisms which are located close by each other and which each comprise two rails which can be displaced relative to each other.
The one rail is firmly connected to the vehicle seat while the other rail is attached to the floor of the compartment area. The rails thereby delimit a groove in which balls are arranged to permit longitudinal displacement of the vehicle seat.
Such longitudinal displacement mechanisms have the disadvantage that they only permit a limited range of longitudinal adjustment of the vehicle seat. The balls in fact are not guided in the longitudinal direction in the groove so that they are distributed unevenly during long longitudinal displacement movements, which results in a sluggish longitudinal displacement mechanism which is difficult to operate.
The limitation of the adjustment range is particularly noticeable in lorries having a so-called sleeping cab in which a bed is pivotably arranged between a use position and a non-use position behind the vehicle seats.
In such a cab it is in fact desirable to be able to displace at least the passenger seat between a front end position close by the instrument panel, when the bed is in the use position, and a rear end position close by the rear wall of the cab, when the bed is not in the use position.
The object of the present invention is to eliminate the abovementioned disadvantages in order to permit such a displacement of a vehicle seat between a front end position close by the instrument panel and a rear end position close by the rear wall of the cab. To this end the invention is characterized in that the locking mechanism comprises at least one roller element which, upon a manually actuable release movement, is brought to bear in a force-transmitting manner against the rail, by which means locking elements incorporated in the locking mechanism are released from a position locking the vehicle seat relative to the rail.
When the arrangement according to the invention is acted upon by the release movement, the roller element is brought to bear against the rail, in which connection the roller element, by rolling against the rail, permits simple adjustment of the seat position even when the rail is extremely long.
Other features characterizing the invention emerge from the subsequent patent claims and the description of an embodiment illustrating the invention. In the description reference is made to the attached figures in which
FIG. 1 shows a diagrammatic side view of a lorry cab equipped with a vehicle seat with an arrangement according to the invention,
FIG. 2 shows a side view of the arrangement according to the invention, and
FIG. 3 shows a section along A--A of the arrangement according to the invention shown in FIG. 2.
The present description relates to the passenger side of a vehicle cab, since a vehicle seat on this side should, for reasons of comfort, be displaceable in the longitudinal direction a further distance than the seat on the driver's side. In spite of this there is of course nothing to prevent the present invention being applied to a driver's seat.
FIG. 1 shows the passenger side of a compartment area 1 of a vehicle cab. The vehicle cab is arranged on a conventional framework (not shown) which constitutes part of a vehicle chassis. The cab is provided with a cab floor 2 which separates the compartment area 1 from the vehicle chassis. In its front part the cab floor 1 connects to a
REFERENCES:
patent: 1735518 (1929-11-01), Valkenburg et al.
patent: 1942998 (1934-01-01), Browne
patent: 2122645 (1938-07-01), Jacobs
patent: 2234442 (1941-03-01), Lustig
patent: 2335254 (1943-11-01), Atwood et al.
Saab-Scania Aktiebolag
Talbott David L.
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