Device allowing a system such as a motor vehicle brake boosting system to be controlled using the foot

A device for allowing a seated user to use his or her foot to control a member for actuating a system such as a motor vehicle brake boosting system, said device including a pedal located facing a seat for said user and articulated about an approximately horizontal first axis perpendicular to a direction joining said pedal to said seat, on a support that is mounted adjustably on a carrying structure which also carries said system and said seat, so as to allow the position of said first axis to be adjusted in terms of its distance from said seat, and a linkage connecting said pedal and said actuating member, which linkage is articulated about axes parallel to said first axis so as to translate a pivoting movement of said pedal about said first axis with respect to said support into a corresponding displacement of said actuating member with respect to said system and into actuation of said system,

• wherein said support is mounted on said carrying structure so that it can be adjusted in terms of translation in said direction so that said first axis can be placed in several positions, in a determined plane, between two extreme positions which are respectively the position closest to and the position furthest away from said seat, while remaining perpendicular to said direction, and wherein said linkage includes:
• a first lever articulated to said carrying structure about a second axis located in said plane, between said extreme position closest to said seat and the latter, parallel to said first axis and having a free end,
• a second lever articulated to said carrying structure about a third axis located in said plane, further from said seat than said extreme position furthest from the latter, parallel to said first axis and having a free end,
• a straight rod articulated to the free ends of said first and second levers respectively at a fourth axis and a fifth axis, said fourth and fifth axes being parallel to said first axis, spaced apart by a distance that is the same as the distance separating said second and third axes from each other and the distance separating said fourth and second axes from each other being identical to the distance separating said fifth and third axes from each other so that said rod and said first and second levers define a deformable parallelogram with said carrying structure,
• a sleeve mounted so that it can slide along said rod and articulated to said pedal about a sixth axis parallel to said first axis and spaced from the latter by a distance that is equal to the distance separating said fourth and second axes from each other or separating said fifth and third axes from each other, and
• a connecting rod providing a link between one of said first and second levers and said actuating member, articulated to said lever about a seventh axis parallel to said first axis and offset respectively with respect to said second or third axis.