Patent ID: 7275984

Claim:
An air conditioning unit for a seat for introducing air to a surface of a seat back of the seat, the seat back having a cushion member that receives a load from a person seated on the seat and is formed with a seat back opening through which air flows and a back board disposed on a rear side of the cushion member, the cushion member and the back board defining a space therebetween, the air conditioning unit comprising: a first air guide disposed in the space defined between the cushion member and the back board, the first air guide having an upstream portion and a downstream portion, the upstream portion defining an inlet port on the rear side of the cushion member, the downstream portion opening to the seat back opening of the cushion member, the first air guide disposed movable toward the back board to follow an elastic deformation of the cushion member; a second air guide disposed on the back board, the second air guide having a suction opening for sucking air therein and an outlet port opening on a side of the cushion member; and a movable connecting part that relatively movably connects the outlet port of the second air guide and the inlet port of the first air guide according to the elastic deformation of the cushion member while defining an air passage for permitting air discharged from the outlet port to the inlet port, wherein the movable connecting part is constructed of a first engaging portion defined by a periphery of the inlet port and a second engaging portion defined by a periphery of the outlet port, the first engaging portion and the second engaging portion engage and slide relative to each other, one of the first engaging portion and the second engaging portion has a double-layer structure including an outer rib and an inner rib, and the other one of the first engaging portion and the second engaging portion has a rib that is received in a recessed portion defined between the outer rib and the inner rib.