| 摘要 |
PROBLEM TO BE SOLVED: To reduce the size and weight of a power source part by providing a power source composed of a single battery, a step-up circuit to transform voltage of the power source into necessary voltage and a flashing circuit to flash light emitting diodes. SOLUTION: A primary battery 2 composed of a dry battery having rated voltage not more than 1.5V is used as a power source, and when a main switch 10 is closed, an electric current flows to a pressure increasing circuit 3, and here, pressure is increased to operating voltage optimal for lighting light emitting diodes(LED) 5. The circuit 3 is a boost type step-up circuit composed of, for example, a coil, a capacitor or the like, and can be operated by voltage of 1V at the lowest. The electric current passing through the circuit 3 passes through a flashing circuit 4, and reaches the LEDs 5 connected in parallel to each other in the necessary number, and simultaneously flashes them or successively flashes them. According to this, since a single dry battery is used, it is smaller and lighter than one using plural pieces, and replacing work is easy. |
