Anti -pollution liquid spear tip that moves

The utility model discloses an anti -pollution liquid spear tip that moves, there are two inside and outside cavities, interior cavity upper end is sealed, the flexible membrane of the first half lateral wall, the latter half is used for depositing the liquid of absorption, the lower extreme has the opening, be used for absorbing and the emission fluid body, outer cavity upper end opening and pipettor pipeline joint, lower end port enclosed, the inner wall is interior cavity lateral wall, at imbibition and flowing back in -process, liquid is including all the time in the cavity, and pipettor pipeline and outer cavity joint, it is isolated with interior cavity, even liquid is absorb too much or the spear tip slope, including liquid only can stop in the cavity, including a material that volatilizees in the same liquid can only stop in the cavity, the unable entering in the pipettor pipeline, having guaranteed the pipettor pipeline is not moved, liquid pollutes among the liquid spear tip. 本实用新型公开了种防污染移液枪尖，有内外两个腔