| 摘要 |
<p>PURPOSE: To enable a night warning lamp to be automatically emitted and flickered only at the time of necessity by forming a circuit with a power and darkness sensing type switching circuit, a vibro-sensing type intermittent switch and an illuminant, and intermittently flashing this illuminant in making a switch sensing a vibration repeat on-off operations intermittently. CONSTITUTION: At the time of walking or bicycle traveling at night, an optical sensor 6 senses a degree of darkness and thereby an electric current flows there, and a vibration to be surely produced in time of walking or traveling oscillates an elastic plate 3 of a vibro-sensing type intermittent switch, so that this elastic plate 3 vibrates up and down with a fulcrum 8 as the center, whereby a magnet 2 being installed in a tip of this elastic plate 3 vibrates up and down as well. When this magnet 2 comes close to a reed switch 1 by this vertical vibration, a contact is attracted by dint of magnetic force and this switch 1 is turned on, and since being separated, it is turned off. Likewise when being turned on, it is energized to a light emitting body(LED), so a flashing lamp emits a light, but when it is turned off, this light goes out.</p> |
