CPC A61M 5/3216 (2013.01) [A61M 5/3272 (2013.01); A61M 2005/3217 (2013.01)] | 19 Claims |
1. A needlestick prevention device for an injection needle carried by a needle-bearing member of a syringe,
in which the device is formed as a one-piece moulding and comprises a first part adapted to be attached to the needle-bearing member and a second part providing a shield for the needle and pivotally movable relative to the first part to expose the needle for use, wherein the second part defines a center line, the device being adapted to adopt a first position in which the needle is protected for transport of the device prior to use, a second position in which the needle is exposed for filling of the syringe and injection, a third position in which the needle is protected after filling of the syringe but before injection and a fourth position in which the needle is locked in the device following injection, the shield having a transport recess and a locking recess connected by a gate device, the arrangement being such that in the third position the needle is in the transport recess and is able to move into the second position, and in the fourth position the needle moves through the gate device into the locking recess, with the gate device preventing movement out of the fourth position, wherein the gate device includes two opposing projections formed in the second part to define a partition between the transport recess and a locking recess and a curved path from the transport recess to the locking recess, the two opposing projections comprising a first projection, and a second projection, wherein the first projection includes a first portion that extends away from the center line and a second end portion that extends from the first portion toward and across the center line to define a distal end of the first projection, and wherein the second projection extends towards the locking recess with a free end of the second projection angled outwardly and spaced from the first projection; and wherein the first and second parts of the device are connected by a living hinge which provides a force to move the second part between the first and second positions once a first movement is initiated by the user, and wherein the living hinge provides a force to move the second part between the second and third positions but not into the fourth position once a second movement is initiated by the user.
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