Needle having a safety device

A needle,

• having a distal end, a proximal end and a stem extending there between as well as a tip at its distal end,
• provided with a safety device for protecting against injuries on the tip of the needle,
• whereas the safety device is arranged so as to be able to slide over the stem between a first position in the proximal region of the stem and a second position at the distal end of the stem
• and having a closed housing with a proximal opening and a distal opening for the needle stem to pass therethrough,
• whereas the needle tip is situated inside the housing when the safety device is in the second position,
• and the safety device comprises a closing device which closes the distal opening of the housing when the needle tip is situated inside the housing,
• wherein,
• the closing device comprises at least one closure element which may slide from a first position away from the opening into a second position facing the opening,
• and cooperates with an activation element which is arranged slidingly on the needle stem,
• and that a driver element which limits the stroke of the activation element on the needle stem in the distal direction is arranged on the needle stem,
• and that the activation element abuts the driver element when the safety device slides from its first to its second position so that, when sliding the safety device further, the activation element moves the closure element from its first to its second position and thus closes the opening in the housing.