| 摘要 |
1. A device for varying the distance between the seats in commercial aircraft, or pitch, comprising longitudinal rails (3) provided, in their upper horizontal flanges, with dovetail shaped grooves (4) and holes (5) pierced in the two inner lips (3a) of the rail defining this groove, the distance between two adjacent holes being equal to that of an elementary pitch of displacement of the seat, and, on each foot of a seat, a device for securing the seat to the rail in the desired position, one of the feet comprising a vertically mobile bolt (9) engaging in a hole in the rail, characterized in that it comprises a driving seat (1), mobile seats (2) disposed in front of and/or behind the driving seat, and a transmission mechanism between the driving seat and the mobile seats, the driving seat bears a drive mechanism (33, 31, 34) moved by a motor (32), this drive mechanism being coupled to elongated connection members (24) mobile in translation, located on each rail (3) and able to be displaced forwards or backwards by a predetermined distance as a function of the desired change in pitch, the transmission mechanism comprises a set of metal slats (11, 11A) connecting, at rail level, the feet of the mobile seats together, the slats (11) nearest the driving seat being coupled to the elongated connection members (24), and means are associated with the feet of each mobile seat to automatically control the unlocking of the seat as soon as the slats (11) are displaced.
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