Contact Trigger Release Needle Guard with Elastic Spring

摘要

A needle guard device mountable to a pre-filled syringe in its ready-to-fill state. The device includes a device shield interconnected to a lock collar with flexible member and biased to move relative to the lock collar. The lock collar interfaces with the syringe neck to attach the device to the syringe. As the device shield moves proximally, rotation arms of the lock collar interact with angled cutouts in the device shield, causing the device shield to rotate relative to the lock collar and disengaging one or more keys on the device shield from one or more keyways in the lock collar triggering the device shield to move from a first configuration in which the device shield is retractable to expose a syringe sharp to a second configuration in which the device shield is fixedly positioned to cover the syringe sharp.

主权项

1. A needle guard comprising:
a lock collar couplable to a portion of a syringe; a device shield; and a flexible member interconnecting the lock collar and the device shield, wherein the device shield is movable relative to the lock collar from a first configuration, in which the device shield is free to retract proximally to expose a syringe sharp, to a second configuration, in which the device shield may move distally under the bias of the flexible member, wherein the device shield is caused to disengage from the first configuration as the device shield moves proximally, and wherein the device shield rotates relative to the lock collar as the device shield retracts proximally to expose the syringe sharp.