Patent ID: 7950102

Claim:
An upright vacuum cleaner, comprising: a cleaner body; a suction port assembly rotatably connected to a lower portion of the cleaner body; a handle mounted to the cleaner body; and a steering unit to elastically support the cleaner body so that a center of gravity of the cleaner body shifts to a direction where the cleaner body is rotated, according to a rotation of the cleaner body to the left or right, wherein the steering unit comprises: a connected housing formed on a lower portion of the cleaner body; a first support and a second support formed in such a manner that one end of the first support and one end of the second support are rotatably formed on opposite sides of the connected housing and the other end of the first support and the other end of the second support are rotatably connected to a first main wheel and a second main wheel, respectively; a shaft to connect one end of the first support and one end of the second support; and a first elastic member disposed between the first support and one end of the shaft, and a second elastic member disposed between the second support and the other end of the shaft, wherein one of the first and second supports that is closer to a direction where the cleaner body is rotated, is rotated with a winder angle than the other of the first and second supports.