| 摘要 |
<p>A fine-adjusting arrangement for a pressure-indicating device of a sphygmomanometer. The sphygmomanometer includes a movable indicator needle, an actuating rod movable in response to changes in the air pressure generated in the sphygmomanometer, and a pair of coupling members intermediate the actuating rod and the indicator for moving the latter along a path between a starting position and an end measuring position. One coupling member is an adjustment plate having a pivot pin for pivotally connecting the rod to the adjustment plate; and the other coupling member is a sector gear operatively connected to the indicator and having an abutment pin spaced from the pivot pin at a spacing which determines the position of the indicator along the path. The fine-adjusting arrangement shifts the adjustment plate relative to the sector gear to thereby vary the spacing, and also sets the indicator with fine minute continuous adjustment to its starting position. The fine-adjusting arrangement includes a support mounted on the plate and having a threaded passage, an adjustment member having a threaded shaft portion mounted in threaded engagement with the passage for continuously variable displacement along the passage in direction towards and away from the abutment pin on the sector gear, and a biasing spring for urging the adjustment member into engagement with the abutment pin, and for shifting the adjustment plate relative to the sector gear in response to such displacement of the adjustment member to thereby vary the spacing between the pins and finely adjust the indicator to its starting position.</p> |
