Abstract: Disclosed is a protective needle cover having a cylindrical body which consists of two pivotally connected halves such that one of the halves is turnable relative to the other half and opens the cylindrical body for a needle to be conveniently and angularly positioned in the protective needle cover. The openable two halves are provided on their free edges at corresponding positions with a set of fastening means such that the cylindrical body of the protective needle cover can be opened or closed simply by using two fingers. When the halves of the cylindrical body are opened by disengaging the fastening means, a needle can be safely put between the opened halves at a certain angle. Then, the halves can be closed again and fastened to each other to form the complete cylindrical body of the protective needle cover. A used needle can therefore, be held in the cover without unexpectedly and dangerously hurting an operator.

Abstract: A dropper-controller including a reservoir connected with a dropper bottle containing a liquid medicine, and an automatically sealing member formed by a cup-like buoyage and disposed in the reservoir. When the liquid medicine gradually drops from the dropper bottle into the reservoir, the buoyage is buoyed up and automatically open a lower discharging opening of the reservoir, permitting the liquid medicine to flow through a hose to an injection needle for injection. When the liquid medicine in the dropper bottle is about exhausted, the level of the liquid medicine in the reservoir descends, making the buoyage together move downward onto the discharging opening of the reservoir and seal the same so as to interrupt the passage of the liquid medicine.