| 摘要 |
PURPOSE:To facilitate the adjustment to a prescribed exhaust speed, in a constant speed exhaust valve device for a sphygmomanometer which is formed so that the exhaust speed can be adjusted by adjusting the opening quantity of a slit formed on an exhaust valve body by pressing the exhaust valve body. CONSTITUTION:An exhaust valve body 1 and a valve pressing body 4 for pressing the exhaust valve body 1 are arranged in a case 3. An adjusting screw body 5 for pushing/pulling-operating the valve pressing body 4 is installed on the case 3. Two screw parts 6 and 7 having the same revolution direction and different screw pitch are installed on the adjusting screw body 5. One screw part 6 is screwed with the case 3, and the other screw part 7 is screwed with the valve pressing body 4. The shift quantity of the valve pressing body 4 becomes the difference of the shift quantity of the adjusting screw body 5 for the case 3 and the shift quantity of the valve pressing body 4 for the adjusting screw body 5, and the shift quantity of the valve pressing body 4 for the angle in the turn of the adjusting screw body 5 can be reduced by reducing the difference of screw pitch of the screw parts 6 and 7. |
