AUTOMATIC INJECTION DEVICE

Systems, methods, and devices are disclosed for facilitating injection of a medicament using an automatic injection device. The automatic injection device includes a housing defining a confined inner space and having a length extending from a proximal end to a distal end along a longitudinal axis. A helical biasing member, or spring, is disposed in the confined inner space, and the spring has an inner diameter at a middle portion that is greater than an inner diameter at the terminal ends of the spring. A syringe plunger has a second bifurcated end extending into an inner bore of the spring. The bifurcated end includes two flexible arms that are able to flex inwardly and outwardly relative to the longitudinal axis within the inner bore of the spring while maintaining an annular gap between the syringe plunger and the spring. 1. An automatic injection device having a distal end configured to deliver a medicament held in a container therein and a proximal end configured to be controllable by a user , the automatic injection device comprising:a housing defining a confined inner space of the automatic injection device, the housing having a length extending from the proximal end to the distal end along a longitudinal axis;a helical biasing member disposed in the confined inner space of the housing along the longitudinal axis having an inner bore and a length extending from a first terminal end of the helical biasing member to a second terminal end of the helical biasing member opposite the first terminal end, an inner diameter of the helical biasing member at a middle portion between the first terminal end and the second terminal end having a first inner diameter greater than a second inner diameter at the first terminal end or at the second terminal end; anda syringe plunger having a first end extending into the container and a second bifurcated end extending into the inner bore of the helical biasing member along the longitudinal axis, the bifurcated end having a first ...