Frontal Attachment Device for Syringe with Pinch-Activated Retraction

摘要

A retractable needle device attachable to the front of a fluid collection or infusion device such as a syringe, the retractable needle device comprising a housing having an engagement member, a slide support surface, a retraction cavity and a first pinch surface; a needle; a needle alignment member comprising a needle tube and a second pinch surface; and a needle retraction mechanism positioned within the needle tube and configured to bias the needle rearwardly; wherein the first and second pinch surfaces are configured so that a pinching force applied to them will cause relative lateral movement between the housing and needle alignment member. This translational movement from an injection position, wherein the needle is aligned with the syringe connector, to a retraction position, wherein the needle is aligned with the retraction cavity, allows the needle retraction mechanism to force the needle into the retraction cavity.

主权项

1. A retractable needle device selectively attachable to a fluid collection or infusion device having a forwardly facing connector, the retractable needle device comprising:
a housing having a rearwardly facing engagement member attachable to the forwardly facing connector, a forwardly facing slide support surface having a first opening in fluid communication with the engagement member and a second opening laterally spaced apart from the first opening, the second opening communicating with a rearwardly projecting needle retraction cavity, a first pinch surface, and a fluid path between the engagement member and the first opening; a needle; a needle alignment member comprising a needle tube and a second pinch surface; a needle retraction mechanism comprising a needle holder, the needle holder positioned within the needle tube and configured to bias the needle rearwardly; and an annular fluid seal seated in the first opening and providing fluid communication between the housing and the needle holder; wherein the first and second pinch surfaces are configured so that a pinching force applied between them will cause the housing to move laterally in relation to the needle alignment member from a first position, wherein the needle is aligned with the first opening, to a second position, wherein the needle is aligned with the second opening so that the needle retraction mechanism biases the needle into the retraction cavity.