RECLINING DEVICE

To provide a reclining device configured to enable a bush to bear force over the whole circumference, which enables the bush to receive even external force in any directions of 360° so as to stabilize sliding movements.SOLUTION: A reclining device 100 according to the present invention comprises: an external tooth gear 10; an inner tooth gear 20; a rotary shaft 30, which is concentrically and rotatably fitted into a cylindrical boss of the inner tooth gear 20, and rotates either one of the external tooth gear and the internal tooth gear about a gear shaft of the other; a bush 40, which is formed in a toric shape, with a center of an outer peripheral surface and a center of an inner peripheral surface being eccentric, has a cam housing part 44 at an inner periphery side thereof and rotates along with rotation of the rotary shaft; a pair of wedge-shaped cams 50; and a spring 60 that energizes the pair of wedge-shaped cams so that the cams simultaneously contact the bush and the cylindrical boss, where a gap between a through-hole of the external tooth gear and the bush is larger than a gap between the cylindrical boss of the internal tooth gear and the bush.SELECTED DRAWING: Figure 2 【課題】ブッシュが全周に渡って軸受することができるようにし、３６０°のいずれの方向からの外力であってもブッシュによって力を受けることで摺動を安定化させることができるリクライニング装置を提供する。【解決手段】本発明のリクライニング装置１００は、外歯歯車１０と、内歯歯車２０と、内歯歯車２０のボスに同軸かつ回転自在に嵌挿されるとともに、外歯歯車又は内歯歯車のいずれか一方を他方の歯車軸を中心に回転させる回転シャフト３０と、外周面の中心と内周面の中心とが偏心している円環状に形成され、内周側にカム収容部４４を有し、かつ回転シャフトの回転に伴い回転するブッシュ４０と、一対のくさび状カム５０と、一対のくさび状カムをブッシュ及び円筒ボスに同時に接触させる方に付勢するスプリング６０と、を備え、外歯歯車の貫通孔とブッシュとの隙間は、内歯歯車の円筒ボスとブッシュとの隙間よりも大きいことを特徴とする。【選択図】図２