| 摘要 |
<p>After removal of a protective cap, the forward end of a barrel (1) of a skin pricker is placed against the skin and the user presses the projecting end of a trigger (6) forwards. As the trigger pivots about a fulcrum (9) of the barrel (1), a thin bridge onto a lancet (2) shears. The lancet is released, and shoots forward as a spring (3) extends, thus projecting a needle tip (4) to prick the skin. This projection is only momentary and the lancet (2), which is captive to the spring (3), is pulled back as the spring (3) reverts to a recovery position where the needle tip is safe inside the barrel. The trigger (6), although broken away from the lancet, remains captive to the barrel by the enlargement (11). The lancet cannot again be operated to eject the needle and the pricker is then intended to be discarded.</p> |
