Patent ID: 7325275

Claim:
A cleaner comprises: a suction motor mounted in a main body, and generating a suction force; a filter that collects dust or filth sucked by the suction force generated at the suction motor; a suction head connected with the filter by a suction tube, and sucking dust and filth on the floor; a brush installed in the suction head so as to ascend/descend linearly in a generally vertical direction, and sweeping dust and foreign substances into the suction head; and a brush height control installed in the suction head, to cause the brush to ascend/descend linearly in a generally vertical direction, wherein the brush height control comprises: a sliding unit that supports the brush so that the brush can ascend/descend linearly in a generally vertical direction while being rotated; a switch operated by a user in order to control the height of the brush; and an operation rod that transmits an operating force of the switch to the sliding unit, and wherein the sliding unit comprises: guide members mounted at an inner side surface of the suction head; a sliding member at which both ends of a hinge shaft extending from both end portions of the brush are rotatably inserted respectively, supported at the guide member so as to linearly move in a vertical direction; and an elastic member positioned at a lower surface of the sliding member, and providing a certain elastic force that pushes the sliding member upwardly.