| 摘要 |
PROBLEM TO BE SOLVED: To carry out each operation only by buttons by providing a cipher registering means storing ciphers inputted by open, close and stop buttons, a locking means invalidating input in a normal mode, and an unlocking means validating the input. SOLUTION: When stop and down buttons 3, 2 are simultaneously pressed, a normal mode is changed to a control mode, and after registering by a cipher registering means on the basis of cipher input through up, down and stop buttons 1-3, the control mode is changed to the normal mode. When the buttons 3, 2 are pressed simultaneously, ciphers are erased by a cipher erasing means during an unlock state. The buttons 3, 2 are simultaneously pressed to change to the control mode, and when a locking means is stored with a lock state, signals of the buttons 1, 2 in the normal mode become invalid. When the buttons 3, 1 are simultaneously pressed to the change to the control mode, an unlocking means compares the ciphers with the cipher input, and in case of coincidence, signals of the buttons 1-3 in the normal mode become valid. A curtain is further moved up or down by operation of the buttons 1, 2. Operation can therefore be carried out only by the buttons. |
