| 摘要 |
<p>PURPOSE:To execute a repressurization and a motor restart for rapid exhaust at the time of an abnormally high pressure even when the pump and the cuff band are in a high pressure condition at the time of pressurizing by providing a large capacity condenser at the power source side of a motor driving circuit to drive a direct current motor. CONSTITUTION:To a motor driving circuit 11, a bulk capacitor C1 for preventing a ripple is provided. The capacitor C1 is different from a capacitor for preventing a noise to be directly fitted to a motor 10, and the capacity is very large. By the capacitor C1, at the time of activating the motor 10, a charge stored in the capacitor C1 is used, the same effect as the case where a large power source is connected is executed, and the motor 10 can be smoothly activated even when a residual pressure in a pump 3 is high. Namely, even when the pump and cuff band internal part is in the high pressure condition at the time of pressurizing, the repressurizing and the motor reactivation for the rapid exhaust at the time of the abnormally high pressure can be surely executed.</p> |
