Safety shield system for an injection pen needle

A safety shield system for an injection pen needle comprising:

• a needle hub;
• a needle mounted in the hub and having an injection end and a non-injection end, wherein the hub has a first recess surrounding the injection end of the needle and a second recess surrounding the non-injection end of the needle to receive a pen-injector;
• a first shield moving coaxially over the first recess of the hub and having an aperture in an end wall thereof for passage of the needle, and traveling from a retracted position in which the needle is exposed to a full travel position in which the shield covers the injection end of the needle;
• and
• a second shield moving within the second recess of the hub and having an aperture to permit passage of the non-injection end of the needle into the pen-injector, and traveling inside the second recess from a position in which the pen injector is installed in the hub to a full travel position in which the pen injector is removed from the hub and the second shield covers the non-injection end of the needle;
• a first elastic member housed between the first shield and the hub, engaging the first shield to hold the first shield in the full travel position;
• a second elastic member housed between the second shield and the hub, engaging the second shield to hold the second shield in its full travel position.