| 摘要 |
PURPOSE:To make brightness of lighting instruments variable by providing a terminal at an intermediate portion between plural batteries connected in series and switching this terminal by a whole voltage terminal. CONSTITUTION:Two sets of battery V1, V2 are connected in series, and a whole voltage terminal is connected with a switch Sw1 while a terminal provided at an intermediate portion between the batteries is connected with a switch Sw1'. When head lamps IR, IL are tobe lighted normally, the switch Sw1 is closed and main filaments M, M or dimmer filaments D, D are fed with current by switching a dimm switch Sw2. When a switch SW1' is closed and a switch Sw2' is connected with a terminal L, the dimmer filaments D, D are lighted by a voltage of the battery V1 alone, thereby, brightness thereof may be decreased. |
