| 摘要 |
<p>A self-damaging syringe comprises a needle, a housing(2), a piston(3) and a plunger(4), the needle is mounted on the front end of the housing(2), the piston(3) is connnected to the front end of the plunger(4), a long groove(5) is axially provided on the plunger(4), a V-shaped elastical stopping block piece(6) is provided in the long groove(5), an outer elastical tongue(6-1) of the "V" shape elastical stopping block piece(6) is provided with two tips(6-2) and the tips puncture backwards into the inner wall of the housing, an inner elastical tongue(6-3) of the elastical stopping block piece(6) punctures backwards into a bottom face of the long groove of the plunger. The depth of the said long groove of the plunger is larger than the radius of the plunger.</p> |
