| 摘要 |
PURPOSE:To display the amount to be measured by means of digit wheels with a simple structure, precisely even when the amount to be measured reduces, by engaging a given pin with a carry pinion. CONSTITUTION:Provided are an input rotating shaft 1 that is mounted rotatably around a shaft 2 and rotates according to the amount to be measured and further is equipped with a push-bar 101, a rotating plate 3 that has a tapper 301 engaged with the push-bar 101, a rotating piece 302 for an engagement and a rotary magnet 303, a driving plate 4 that has a rotating piece 401 for an engagement where one end thereof is engaged with the rotating piece 302 for an engagement in a positive rotation and the other end in reverse rotation and a pin 402 to be engaged with a carry pinion 5 at each rotation, a digit wheel 7 that is engaged with the pinion 5 and subjected to carry or to the inverse one by one in character at each rotation of the driving plate 4 in a positive or reverse rotation, a fixed magnet 10 facing to the magnet 303 and a fixed magnet 11 that attracts the magnet 303. Further, it is arranged such that a distance is given between one end of the rotating piece 401 for an engagement and the other end, and the pin 402 is engaged with the pinion 5 when the driving plate 4 rotates rapidly. |
