CPC G01N 21/8483 (2013.01) [G01N 1/14 (2013.01); G01N 21/78 (2013.01); A61B 2010/0208 (2013.01); G01N 2001/1427 (2013.01); G01N 2021/7786 (2013.01)] | 19 Claims |
1. A sampling device, comprising:
a syringe barrel having an injection hole and an opening opposite to one another, and a holding portion formed at an outer edge of the opening;
a plunger body axially disposed in the syringe barrel through the opening, wherein a protruding wall is formed in an axial direction of the plunger body, and a first break is formed in an extending direction of the protruding wall;
a spring disposed around the plunger body; and
a fastening assembly having a through hole allowing the plunger body to penetrate therethrough and an engaging structure communicating with the through hole, wherein the fastening assembly is engaged with the holding portion through the engaging structure, and a groove rail is formed on a wall of the through hole for receiving the protruding wall of the plunger body, and a fastening portion is formed on the wall of the through hole for limiting a displacement of the plunger body.
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