Assistance device for climbing stairs

摘要

An assistance device includes a body having two wheels, and a pivotal device located in the body. Two transmission units are pivotably connected to the pivotal device by two shafts. A restriction unit includes a first link, a second link and a rail which is connected to the body. The first link has the first end pivotably connected to one of the two transmission units. The second link is pivotably connected to the other one of the two transmission units. A roller is connected to the first end of the second link and movable along the rail. A leg having a top end to which the second end of the first link is pivotably connected. The second end of the second link is pivotably connected between the top end and the lower end of the leg. The leg contacts against the ground to lift the body to climb stairs.

主权项

1. An assistance device comprising:
a body having two wheels on two sides thereof; a pivotal device located in the body; two transmission units each having a shaft and a transmission arm connected to the shaft, the two shafts pivotably connected to the pivotal device respectively; a restriction unit having a first link, a second link and a rail which is connected to the body, the first link having a first end pivotably connected to one of the two transmission units, the second link pivotably connected to the other one of the two transmission units, a roller connected to a first end of the second link and movable along the rail, and a leg having a top end and a lower end, a second end of the first link pivotably connected to the top end of the leg, a second end of the second link pivotably connected between the top end and the lower end of the leg.