| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a dart with lighting function in which a dart incorporates a lighting device, the dart lights according to the motion of the dart and the dart having high design property can be offered.SOLUTION: The dart has a barrel whose inside is composed of: a battery case (6); an insulation sheet (7); an electron circuit case (8); a spacer (9); and a reflector (5). The electric circuit is structured including and integrating: a power source (battery) (10); a compression spring (11); a printed substrate (12); a vibration sensor (13); and a light-emitting member (LED or the like) (14), and the dart with lighting function is characterized by lighting only when necessary.</p> |
