| 摘要 |
A blood sampling device has a lancet (2) captive within a housing (1), to be released from a rearward primed position by pressing a trigger (18) on the side of the housing. A spring (3) shoots the lancet (2) forwards, momentarily to project its tip. The lancet (2) is initially held by a hooked tongue (25, 28) that latches behind a transverse web (10, 11) within the housing, the trigger action dislodging that engagement. The tongue (25) either springs back after release and so will abut the trigger (18) or the front of the web (10) if pushed back in an attempt to re-latch, or it will stay permanently deformed and thus be unable to re-engage the web (10). Alternatively, the trigger (18) may slice off the hook (28), making re-use impossible. |
