Chairs and seats – Movable back – Tiltable
Patent
1997-07-23
1999-03-23
Cuomo, Peter M.
Chairs and seats
Movable back
Tiltable
296 6517, B60N 220
Patent
active
058849734
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an actuating mechanism for unlocking the safety-catch of a foldable back, equipped with the angle adjusting mechanism, of a car-seat.
BACKGROUND OF THE INVENTION
With such actuating mechanisms there is the problem that only a limited swivelling angle is available for the swivelling path of the actuating lever. This swivelling angle cannot be increased resulting consequences for operating quality. In this connection, it proves to be a disadvantage that the available swivelling range, already limited, anyway, which determines the actuating course of the safety-catch, cannot be fully utilized. The ability to utilize the swivelling angle is reduced because the seat back cannot be folded into the forward position from a preset fixed position, but rather the folding procedure must be possible with every one of the leaning settings conceivable for use. In actuality, a swivelling path of 40.degree., as an example, is reduced by 10.degree., for example, because the seat-back angle adjustable with an angle adjusting mechanism can easily vary by 60.degree. or more in the state of use.
SUMMARY OF THE INVENTION
The present invention is based on the technical problem of designing an actuating mechanism of the known kind in such a way that the adjusting path of the actuating lever can always be utilized to its full extent for actuating the safety-catch, independently of the basic angle of the seat-back as set.
The result of providing an additional reversing mechanism between the lower reversing position and the safety-catch is that the angle of wrap of the control cable around the lower reversing position is practically the same in each of the positions of use that are determined by the adjusting range of the angle adjusting mechanism, unlike in the known solution without additional reversing where the angle of wrap of the lower reversing position does not change depending on the leaning position set for use. In this way, in the present invention the entire adjusting path created by the actuating lever is available for unlocking the safety-catch.
BRIEF DESCRIPTION OF THE DRAWINGS
The preferred embodiment of the invention is illustrated in the accompanying drawings, wherein:
FIG. 1 shows a schematic side view of a seat-back with an adapter in an extremely far forward position,
FIG. 2 shows the illustration according to FIG. 1 in utilization position of the seat-back, and
FIG. 3 shows the illustration according to FIGS. 1 and 2 with the seat-back leaned as far back as possible.
DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
Seatback 2 supports, at its upper end, an actuating lever 4 designed as a one-armed lever pivotally supported about a bearing support 5 at the upper end of the seat-back. Attached to the actuating lever 4 is a control cable 3 which, approximately in the area of the middle of the seat-back, is guided forwardly in relation to its stretched state by a guide element 8, for example a roller. The control cable 3 runs through a lower circular or cylindrical reversing position member 6 whose center line is designated as number 7. The center line 7 coincides, at least approximately, with the swivelling axis of the angle Adjusting mechanism or the swivelling axis around which the seat-back is pivotally attached to adapter 11. Between the adapter 11 and the seat-back 2, in the area of the swivelling axis 7, and with at least approximately the same axis, is the angle adjusting mechanism (not shown) which, for example, can be a known, wide wobble gear. With this angle adjusting mechanism, the basic angle of the seat-back 2 in relation to the adapter 11 is set.
The adapter 11 is, in turn, hinged around a bolt 12 that connects the adapter in a swivelling manner with the seat. The center of the bolt 12 forms the swivelling axis around which the adapter can be swivelled together with the seat-back 2, when the safety-catch 1 is released. The safety-catch 1 is lodged swivelling around a bolt 15 and, in locked state, grasps from behind a locking pin 10 which
REFERENCES:
patent: 5240309 (1993-08-01), Kojer
patent: 5527087 (1996-06-01), Takeda et al.
patent: 5662368 (1997-09-01), Ito et al.
Besselmann Norbert
Reinhard Wilhelm
Allred David E.
Bertrand Faure Sitztechnik GmbH & Co. KG
Cuomo Peter M.
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