Hinge assembly for an injector

A locking hinge assembly in an injector, the injector comprising a forward handle member and a rear handle member connected at a hinge defining an axis of rotation, the hinge assembly slidable along the axis of rotation between a locked position and an unlocked position, the locking hinge assembly comprising:

• a first hinge member comprising a first portion, an intermediate portion, and a second portion, wherein the first portion comprises a non-circular cross-section, wherein the intermediate portion comprises a flange comprising at least one groove, and wherein the second portion comprises an extension;
• a second hinge member comprising a first portion and an opposite second portion, wherein the first portion comprises a cavity configured to receive the first hinge member extension, and wherein the second portion comprises a non-circular cross-section;
• a biasing member positioned within the second hinge member cavity and configured to exert an force outward against first and second hinge members;
• and
• a locking element positioned about the hinge and comprising a ratchet arm, the locking element configured to be received in the at least one groove such that rotation of the forward handle member and rear handle member about the axis of rotation is prevented when the hinge assembly is in the locked position.