Injection-assisting probe for medical injector assembly

An injection device comprising:

• a housing;
• an injection-assisting probe retractably located at a distal end of an injection device;
• a nozzle assembly having an opening for slidingly receiving at least a portion of the probe and defining a fluid chamber and being removably associated with the housing;
• a trigger assembly;
• a plunger;
• and
• an energy generating source operatively associated with the trigger assembly so that movement of the trigger assembly activates the energy source to move the plunger in a first direction and expel a fluid from the fluid chamber;
• wherein said injection-assisting probe comprises:
• a probe tip located at a distal end of the probe with at least a portion configured and dimensioned to slide within and to extend beyond the nozzle assembly opening the nozzle assembly opening;
• a discharge channel within the probe tip and terminating in an orifice through which the fluid is expelled;
• a body portion extending towards the discharge channel;
• a plunger receptor configured and dimensioned to receive at least a portion of the plunger;
• and
• a retraction element operatively associated with the nozzle assembly, wherein
• the probe is located within the nozzle assembly in a retracted position prior to activation of the energy source;
• movement of the plunger in the first direction upon activation of the energy source results in at least a portion of the probe tip extending from the nozzle assembly opening such that the probe tip protrudes beyond the nozzle assembly opening;
• and
• the retraction element returns the probe tip to the retracted position after activation of the energy source.