Patent ID: 7533441

Claim:
An air path conversion valve assembly of an upright vacuum cleaner having a body pivotably mounted to a brush assembly, comprising: a duct member mounted to the body, the duct member comprising a first air path connected with the brush assembly, a second air path, a third air path connected with a suction source of the vacuum cleaner, and a crossing air path in which the first, the second, and the third air paths connect; a valve member pivotably mounted to the crossing air path; a cam unit pivoting the valve member to connect the first air path and the third air path when the body is inclined, and to connect the second air path and the third air path when the body is upright; and at least one link member connecting the cam unit and the valve member to transfer a driving force of the cam unit to the valve member, wherein the cam unit is mounted on a body pivot axis and comprises: a cam diverter movable in a direction of the body pivot axis; and a cam guide covering the cam diverter, the cam guide having a cam profile changing a pivotal movement of the body to a movement of the cam diverter in a lengthwise direction with respect to the body pivot axis.