To guarantee safety for fall protection, offer ease of pedaling, and stabilize a left and right balance and a forth and back balance.SOLUTION: A power-assisted quadricycle 1 includes two front wheels 42, two rear wheels 52, cranks 64a and 64b that transmit power to the rear wheels 52 and rotate about crank shafts, a seat 71 on which a driver is seated, and a hip support member 72 that supports the hip of the driver who is seated on the seat 71. A fore-and-aft direction distance L from the center of the crank shaft to the rearmost end of the seat is larger than a vertical direction distance H orthogonal to the fore-and-aft direction from the center of the crank shaft to a seat uppermost end.SELECTED DRAWING: Figure 1
【課題】転倒防止の安全性を図れ、かつ漕ぎやすさを実現し、かつ左右前後のバランスの安定化を図る。【解決手段】電動アシスト四輪自転車1は、二つの前輪42と、二つの後輪52と、前記後輪52に動力を伝達する、クランク軸回りに回転するクランク64a、64bと、運転者着座用のシート71と、前記シート71に着座する前記運転者の腰を支える腰支え部材72と、を備え、前記クランク軸中心から前記シート最後端までの前後方向距離Lが、前記クランク軸中心から前記シート最上端までの前記前後方向に直交する上下方向距離Hより大きい。【選択図】 図1
QUADRICYCLE
四輪自転車
2023-08-18
Patent
Elektronische Ressource
Japanisch
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