| 摘要 |
<p>PURPOSE:To prevent malfunction even if there are the erroneous shift of a mouse and the erroneous depression of a mouse key by operating a prevention means by means of the operation of an operator through the use of a signal transmission means, and preventing the transmission of an erroneous cursor shift signal and a mouse selection signal from the mouse. CONSTITUTION:Discrete values 1-9 showing the shift quantity of the mouse are sequentially transmitted from a decoder 15 to an AND circuit 24 with the shift of the mouse 10 in the direction of X and the shift discrete values for the direction of Y are sequentially transmitted from a decoder 17 to an AND circuit 25. When a lock key 23 is depressed, a voltage from a power source +V is voltage-divided by resistances R1 and R2 and they are transmitted to circuits 24-27. Then, the discrete values 1-4 of the decoders 15 and 17 are transmitted from the circuits 24 and 25. When keys 12 and 13 are depressed, partial pressures are respectively and simultaneously transmitted to the AND circuits 26 and 27. When the key 23 is not depressed, the partial pressures are impressed on the circuits 24-27.</p> |
