Abstract: A drip annunciator comprises a main body and a needle bottle capable of inserting into a drip bottle for outputting liquid. A buoyancy body is received in the needle bottle, which may move with the liquid level. The bottom of the buoyancy body is installed with a magnet and a magnetic sensor on a control rod at the lower side thereof. Thus, as the liquid level within the drip bottle has descended to a predetermined position, the magnet will actuate the magnetic sensor to be electrically conducted, and then the buzzer at another side emits an alarm or lights up an alarm light so inform one to update the liquid therewithin. Meanwhile, a rolling ball will seal the liquid opening to prevent air to flow inwards so as to safeguard the life of a patient. Besides, another soft tube can be disposed between the liquid transferring tube and the needle bottle, and an adjusting wheel and a screw rod screwedly through the central screw hole and having a tightening block are installed aside.

Abstract: A non-contact automatic latch lock mainly composed of magnet coil, counter, micro-switch, counter, magnetic induction switch, lock mandrel locating plate, axial rod locating plate, brake lever and lock mandrel control axle, wherein by means of first magnet coil, second magnet coil, counter, micro-switch and magnetic induction switch, lock tongue being able to automatically draw back inside lock body for the opening of door and being able to automatically protrude beyond lock body for the closing of door.