AUTOINJECTOR

The invention relates to a device for automatic injection of a product into an injection site, said device comprising: - a housing (3) receiving a container (6) movable between an initial position, in which a a needle (8) of the container (6) does not extend beyond a distal end of said housing (3), to an insertion position, in which the needle (8) extends beyond said distal end; - a needle shield (12) for receiving said needle (8); - said deshielder (33) being coupled to said needle shield (12) by first connecting means (51) and removably assembled to the distal part of the housing (3) by second connecting means (44, 45a, 45b, 57); said first and second connecting means being designed so that a rotational movement of the deshielder (33) about the device axis (2) causes an axial displacement of the needle shield (12) in the distal direction, the second connecting means (44, 57) are designed to allow a rotational movement of the deshielder (33) about the axis (2) with no possible simultaneous axial translation of the deshielder (33).