Relating to skin prickers

摘要

A lancet body for a skin pricker has resiliently flexible fingers ( 9 ) with outwardly splayed tips ( 10 ). The device is fired by pressing a trigger ( 13 ) and a spring ( 5 ) urges the lancet forwards and the fingers ( 9 ) flex inwards as the tips ( 10 ) snap past barbs ( 11 ), so that the tips ( 10 ) of the arms ( 9 ) engage behind the barbs ( 11 ). If the user tries to push the lancet back into the cocked condition, the fingers ( 9 ) are trapped and will flex as the tips ( 10 ) press against the barbs ( 11 ) until the arms buckle and the tips ( 10 ) are pushed out through openings ( 14 ). Thus the lancet is arrested and immobilised before a re-cocked position is reached, and re-firing is prevented.