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发明授权
CN107524402B 窗帘 有权

窗帘
摘要：
本发明公开一种窗帘，其包含有一卷筒、一滚筒、一顶架、一离合器以及一板体组件。卷筒和滚筒分别在两个相间隔的位置与顶架相枢接。离合器与滚筒相连接且可介于卡合状态和脱离卡合状态之间进行切换。离合器在卡合状态时可阻止滚筒朝第一方向转动，而在脱离卡合状态时则允许滚筒朝相反的第二方向转动。板体组件包含有多个横向片，横向片分别与第一板体和第二板体相连接。在第一板体维持接触滚筒下，卷筒可转动以卷绕和展开板体组件。通过旋转横向片，板体组件可介于允许光线通过的开启状态和阻挡光线通过的遮蔽状态之间进行切换。离合器处于卡合状态并迫使滚筒保持静止时，卷筒可朝展开方向转动，以促使板体组件从遮蔽状态切换为开启状态。
摘要（英）：

A window shade includes a reel and a roller pivotally connected with a head frame at two spaced-apart positions, a clutch operatively connected with the roller and switchable between an engaged state preventing the roller from rotating in a first direction and a disengaged state for rotation of the roller in an opposite second direction, and a panel assembly including multiple transversal vanes respectively connected with a first and a second panel. The reel is rotatable to wind and unwind the panel assembly with the first panel remaining in contact with the roller. The panel assembly is switchable between an open state for light passage and a closed state blocking light passage by rotating the transversal vanes. The reel is rotatable in an unwinding direction while the roller is kept stationary by the clutch in the engaged state for switching the panel assembly from the closed to open state.

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