Seat belt arrangement for a suspension seat and vehicle equipped with such an arrangement

A vehicle comprising:

• a frame;
• a suspension seat installed so as to be capable of moving vertically relative to the vehicle frame in response to the vehicle movements, the suspension seat including a first and a second lower attachment points;
• and a seat belt arrangement for a suspension seat installed in a vehicle, the suspension seat being capable of moving vertically relative to the vehicle frame in response to the vehicle movements, the seat belt arrangement comprising
• a seat belt having a first end portion intended to be secured to the seat at a first lower attachment point, and a second end portion mounted on a reel intended to be secured to the vehicle frame,
• a lower deflection member slidably attached to the seat belt between the first end portion and the second end portion and equipped with a locking element intended to be removably locked in a second lower attachment point on the seat such that, when the lower deflection member is locked in the second lower attachment point, the direction of the seat belt is modified by the lower deflection member,
• an upper deflection system to deviate the seat belt between the lower deflection member and the reel, and in or on which the seat belt may slide, and
• a pivotable arm in or on which the upper deflection system is arranged and which is intended to be mounted on the vehicle frame so as to be able to automatically pivot about a pivot axis relative to the vehicle frame when the seat moves vertically, in order to keep the length of the torso portion of the seat belt, between the upper deflection system and the lower deflection member, substantially constant, and
• the seat belt first end portion being secured to the seat at the first lower attachment point, the reel on which the seat belt second end is mounted being secured to the vehicle frame, and the pivotable arm being, pivotably mounted on the vehicle frame about a pivot axis.