Retraction type blood sampling device

• Main Authors: REN KEWEI, WANG YANLI, ZHANG WENZHE, LI ZONGMING, ZHOU PENGLI, LI ZHEN, MA BO, REN JIANZHUANG, WU ZHENGYANG, LU HUIBIN, HAN XINWEI, BI YONGHUA, SHUI SHAOFENG, WU GANG, LI YAHUA
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2017
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

The invention relates to a retraction type blood sampling device. The retraction type blood sampling device comprises a needle tube shell and a pressing cap, a cylindrical cam, a unilateral bearing, a first spring, an upper end face cam, a lower end face cam, a central shaft, a guide sleeve, a second spring and a blood sampling needle which are arranged in the needle tube. The retraction type blood sampling device can quickly and instantly puncture in a puncture process and then can quickly retract after the puncture; the instant puncture can greatly relieve the pain feel of the user; the user even has no feel after the ending of the puncture, so that the psychological burden of the user can be greatly relieved; the principle of double-spring double damping vibration is adopted in the device; in a one-time pressing process, the needle cannot pop out for puncturing the skin after the needle quickly punctures deep into the skin, so that high speed for puncture is maintained while secondary injury caused by the