Needle protection assembly with radially movable locking element

Abstract

The application relates to needle protection assembly (I)) comprising: - a support (2) of the needle (3), - a needle shield (8) having a longitudinal axis A, - urging means (13) for displacing said needle shield (8) from a ''in use'' position to a ''after use'' position, - a locking element (10) intended to prevent said needle shield (8) from moving back from its ''after use'' position to its ''in use'' position, characterized in that said locking element (10) has a longitudinal axis B and is radially movable with respect to said needle shield (8) between a ''free'' position, in which the longitudinal axis A of the needle shield (8) and the longitudinal axis B of the locking element (10) are merged and in which said needle shield (8) is movable from its ''in use'' position to its ''after use'' position, and a ''locking position'', in which the longitudinal axis B is radially spaced apart from the longitudinal axis A and in which movement of the needle shield (8) from its ''after use'' position to its ''in use'' position is prevented.

Description

technical field [0001] The present invention relates to a needle protection assembly for connection to an injection device such as a syringe that is required to complete an injection, said needle protection assembly being activated after injection in order to protect the user from accidental prevent needlestick injuries and prevent needles from being reused. [0002] In this application, the distal end of an element or device is understood to mean the end furthest from the user's hand, while the proximal end is understood to mean the end closest to the user's hand . Also, in the present application, "distal direction" is understood to mean the direction of injection, and "proximal direction" is understood to mean the direction opposite to the direction of injection. Background technique [0003] In the medical field it is common to provide injection devices with a needle protection system that prevents the needle from being touched by the user or patient before and / or afte...

AI Technical Summary

Problems solved by technology

[0006] However, this prior art needle protection system suffers from the disadvantage that because of the energy necessary to deflect the flexure member, the spring force must be large in order to move the needle shield and overcome the resistance of the flexure member

Such injection devices are therefore generally not easy to use: moreover, since these devices cannot be secured automatically, the risk of needle stick injuries after their use can be very serious

[0009] Furthermore, prior art needle protection systems necessarily require a number of different parts, in particular forming the locking system, and are therefore difficult and time-consuming to manufacture

Images