The present invention provides a disposable blood lancet structure. The blood lancet device has a blood collection tube, and the blood lancet comprises a syringe member. The syringe member has a cylinder unit and a rotary base. The cylinder unit is configured with at least one positioning portion. One end of the rotary base is configured with a guide groove respectively corresponding to the positioning portion. The rotary base can be rotated at the positioning portion relative to the cylinder unit by the guide groove device. The blood lancet also comprises a needle member. The needle member is outwardly extended with a locking portion. The locking portion is correspondingly inserted into a lock hole at the other end of the rotary base, and may control the direction of the lock hole by rotating the rotary base, so as to rotarily lock the needle member on the syringe member. The present invention provides a disposable blood lancet structure. The blood lancet device has a blood collection tube, and the blood lancet comprises a syringe member. The syringe member has a cylinder unit and a rotary base. The cylinder unit is configured with at least one positioning portion. One end of the rotary base is configured with a guide groove respectively corresponding to the positioning portion. The rotary base can be rotated at the positioning portion relative to the cylinder unit by the guide groove device. The blood lancet also comprises a needle member. The needle member is outwardly extended with a locking portion. The locking portion is correspondingly inserted into a lock hole at the other end of the rotary base, and may control the direction of the lock hole by rotating the rotary base, so as to rotarily lock the needle member on the syringe member.一種拋棄式採血針結構,該採血針裝置有一採血管且該採血針包括一針筒件,該針筒件具有一筒體單元與一轉體座,該筒體單元上設有至少一定位部,該轉體座一端對應該定位部各設有一導溝,該轉體座藉該導溝裝置於該定位部處並相對該筒體單元進行旋轉;一針頭件,該針頭件往外延伸有一卡止部,該卡止部對應嵌入該轉體座另一端之一鎖孔,並藉該轉體座之旋轉控制該鎖孔方向,以將該針頭件旋轉鎖合於該針筒件上。100...採血針10...針筒件11...筒體單元12...轉體座110...小徑
