Electric blind apparatus

Details Electric blind apparatus Electric blind apparatus

E - Fixed Constructions

06

B

342/10, 342/31,

E06B 9/68 (2006.01) E06B 9/32 (2006.01)

Patent

CA 1283471

ABSTRACT OF THE DISCLOSURE When a raising switch (21) or a lowering switch (23) is operated in an electric blind apparatus, an NPU (34) rotates a geared motor (4) so that a take-up drum (37) winds or unwinds a lifting tape (10) to raise/lower vanes (13) of a blind. Upon rotation of the take-up drum, a photointerrupter (38) generates pulse signals and the MPU counts the pulse signals to judge a vertical position of the blind. When an opening or closing switch (24, 26) is operated, the MPU rotates the geared motor so that a ladder drum (39) is rotated to wind ladder cords (11) fixed to the ladder drum, thereby to adjust an open/close angle of the vanes. Following rotation of the ladder drum, a photointerrupter (41) supplies pulse signals to the MPU, which in turn counts the pulse signals to judge the open/close angle of the vanes.

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