| 摘要 |
PURPOSE:To surely know a time without seeing a wrist watch itself and without making nearby persons hear an unnecessary sound by providing the surface of the wrist watch is contact with skin with electrodes and making a faint current flow between the positive and negative electrodes. CONSTITUTION:When a just timer or a time capable of being arbitrarily set is reached or when an arbitrarily set time has elapsed and a residual time is reduced to zero, a time measuring circuit 1 outputs a trigger pulse 11 to a faint current circuit 3. The circuit 3 boosts an electric power supplied from a battery 2 by a regulator and a capacitor is charged with the power. The circuit 3 outputs a faint current 31 to positive and negative electrodes 4 and 5, respectively, by using the pulse 11 from the circuit 1 as a trigger. The positive and negative electrodes 4 and 5, respectively, arranged on the rear surface of a wrist watch are in contact with the skin of a wrist watch carrier and transmit the faint current 31 to the skin. Thus, the elapse of time can be known by an electric stimulus, not by an eye or a sound. |
