| 摘要 |
PROBLEM TO BE SOLVED: To provide a shading member lifting-and-lowering device equipped with a clutch unit which can smoothly lift and lower the shading member. SOLUTION: The clutch unit includes: a rotating drum 25 rotated by the operation of an operation code; a transmitting drum 27 for driving a lifting and lowering part; first and second engaging means 32, 40 formed in the rotating drum 25 and the transmitting drum 27; and clutch parts 26, 39 for acting on the first and second engaging means and transmitting the rotation of the rotating drum 25 to the transmitting drum 27 by the first and second engaging means. The clutch portions are installed movably to the axial directions of the rotating drum 25 and the transmitting drum 27, and the clutch section 26 is elastically supported by energizing force of an energizing means 28 at a position transmitting the rotation of the rotating drum 25 to the transmitting drum 27, whereby biting of the first and second engaging means 32, 40 with the clutch part 39 can be avoided. COPYRIGHT: (C)2010,JPO&INPIT
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