A61B 5/150687

{Pivotable protective sleeves, i.e. sleeves connected to, or integrated in, the piercing or driving device, and which are pivoted for covering or uncovering the piercing element comprising means to impede repositioning of protection sleeve from covering to uncovering position semi-automatically triggered, i.e. in which the triggering of the pivotable protective sleeve requires a deliberate action by the user such as manual release of spring-biased extension means}