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发明授权
CN1852673B 真空吸尘头 失效 - 权利终止

真空吸尘头
摘要：
一种真空吸尘头(100)包括可旋转刷棒(112)和用于驱动该刷棒(112)的空气涡轮机(240)。进气(120)使空气驱动该涡轮机。按钮(200)可在打开位置和关闭位置之间移动，其中在打开位置，它允许空气进入到该涡轮机(240)，而在关闭位置，关闭该入口(120)并阻止空气到达该涡轮机(240)。该按钮(200)可响应该涡轮机(240)的转速或者流动到该涡轮机(240)或者经由该涡轮机(240)的空气流动超过预定极限时而移动。
摘要（英）：

A vacuum cleaning head (100) comprises a rotatable brush bar (112) and an air turbine (240) for driving the brush bar (112). An air inlet (120) admits air to drive the turbine. A button (200) is movable between an open position, in which it admits air to the turbine (240), and a closed position in which it closes the inlet (120) and prevents air from reaching the turbine (240). The button (200) ismovable in response to the speed of rotation of the turbine (240), or flow of air to or through the turbine (240) exceeding a predetermined limit.

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