a mechanism to protect the needle of a syringe to prevent accidental puncture and subsequent possible infections

摘要

A device for protecting the needle of a syringe to keep it sterile before use and to prevent it from accidental pricks after use consists of a rigid protection housing (6, 6A) connected by an elastic member (7) to the syringe cylinder (1) at the opposite end apart from the needle. Protection housing (6, 6A) enclosing the syringe is shorter than the latter. When the elastic member is in its rest position, needle (5) is completely enclosed in the protection housing; when the elastic member is manually contracted, protection housing slides along the syringe cylinder, thus allowing the needle to be extracted. Several embodiments of a safety lock means are provided to prevent the needle to be accidentally extracted from the protection housing.