| 摘要 |
PURPOSE:To prevent breakdown of a spring for step difference absorption due to the suction impact of a plunger by deforming a movable contact point so that the flexible allowance of a spring for step difference absorption may be limited to within a range of tolerable tension and thus minimizing the gap. CONSTITUTION:A movable contact point 18 is installed on a shaft 12 interlocked to the suction action of a plunger, with the same bulge as that of a spring for step difference absorption 15 provided. The movable contact point 18 is provided with an opposite fixed contact point (not illustracted). Normally, however, this fixed contact point is not parallel and is provided with a spring 15 for step difference absorption to eliminate poor contact of the contact point because of the existence of step difference. If the gap B between the spring 15 and the movable contact point 18 becomes wide on account of the suction impact by the plunger, the spring 15 is apt to be broken or lose its repulsive force. However, by fitting the shape of the movable contact point 18 to that of the spring 15, it is possible to minimize the gap and reduce the incidence of breakdown with increased reliability. |
