Drug delivery device safety system

A drug delivery device, the device comprising:

• a housing;
• a product container disposed in the housing, and a needle extending from a distal end of the product container;
• a plunger rod for dispensing a product from the product container, the plunger rod including a first indent at a distal portion of the plunger rod and a second indent at a proximal portion of the plunger rod;
• a blocking component at a proximal end of the housing, wherein the plunger rod is slidably received within the blocking component, and wherein the blocking component includes a deflectable arm;
• and
• a needle cover at least partially disposed in the housing.

A drug delivery device, the device comprising:

• a housing;
• a plunger rod;
• a needle cover disposed at least partially within the housing;
• and
• a rotating component having a track extending along an outer surface of the rotating component,
• wherein a portion of the plunger rod extends through a central region of the rotating component, wherein the rotating component is located radially inward of a proximal portion of the needle cover, and wherein a projection of the needle cover engages the track of the rotating component and is configured to move along the track of the rotating component as the device transitions from a first state, to a second state, and to a third state.

A drug delivery device, the device comprising:

• a housing comprising a deflectable tab;
• a syringe arranged in the housing;
• a plunger rod including a stopper for dispensing a product contained in the syringe;
• a needle cover at least partially disposed in the housing, the needle cover including a notch;
• and
• a ring comprising a ledge, the ring positioned around a proximal end of the syringe,
• wherein the device is configured to transition between a first state, a second state, and a third state,
• wherein in the second state, the needle cover is located further proximally within the housing compared to the first state and the third state, the proximal end of the needle cover is configured to push the deflectable tab of the housing outwards, and the notch of the needle cover engages with the ledge of the ring.

A drug delivery device, the device comprising:

• a housing;
• a product container arranged in the housing;
• and
• a plunger rod partially disposed inside the product container, the plunger rod including a first portion and a second portion, wherein the first portion is configured to receive the second portion,
• wherein the first portion and the second portion of the plunger rod are configured to transition from a first state to a second state, wherein at the first state, the second portion of the plunger rod is prevented from moving in a proximal direction and at the second state, the second portion of the plunger rod moves freely in a proximal direction.