| 摘要 |
PURPOSE:To perform zero reduction of a mechanical display device with relatively simple constitution by making use of the operation of the time when a nozzle is removed from a nozzle case. CONSTITUTION:When a nozzle is removed from a nozzle case, a wire 15 slackens and an operating lever 29 is rotated counterclockwise around a zero resetting shaft 19 by the shrinkage force of a spring 45. Therefore, a pawl plate 40 rotates a cam 30 counterclockwise, and rotates a connecting member 32 in the same direction by means of a torsional spring 34, thereby rotating the shaft 19 connected to this in the same direction. This forces a lifting lever 48 to lift a pinion shaft 24 against a spring 27' and to turn a bracket 26 counterclockwise around a fulcrum shaft 27, thus disengaging pinions 23-23'' from the gears 25- 25'' of digit gears 20-20''. On the other hand, the zero reducing lever attached to the bracket 26 reduces the respective figures to zero. Thereby, the zero reduction is accomplished effectively with the simple constitution. |
