Common causes of air leakage include aging of rubber components (such as rubber balls, arm bands, and rubber pipes), cracks and gaps; the conical surface of the air valve compressor shaft and the conical surface of the valve hole are in poor contact due to wear; the inner valve is small Dirty or aging at the rubber slit. For the above reasons, you can replace the aging rubber parts (such as rubber balls, arm bands, rubber pipes); improve the smoothness of the cone surface, improve the contact condition, and ensure the tightness; remove the dirt at the small rubber slit in the valve, or directly Replace the old rubber.
The broken or broken scale glass tube is caused by the closing of the blood pressure timer, the improper placement of the rubber ball, the accidental damage of the repaired blood pressure timer, and the accidental fall. Because the graduated glass tube is fragile, the rubber ball should be placed on the right side when closing the blood pressure meter; try not to touch the graduated glass tube when repairing the blood pressure meter; avoid dropping the blood pressure meter.
