The present invention discloses a needle device, comprising a needle base and a needle head being placed in the needle base, a first sleeve part slides on the needle base, a second sleeve part slides on the first sleeve part at least one protrusion portion is arranged on upper surface of the needle base, a through hole is arranged at a rear end of the first sleeve part, at least one elastic limit portion is arranged in the through hole, the elastic limit portion prevents the protrusion portion from moving toward fixed end of the elastic limit portion when the protrusion portion moves to position between inner wall of the through hole and free end of the elastic limit portion a limit apparatus is also arranged between the first sleeve part and the second sleeve part. After use of the needle device of the present invention, the needle head can be covered quickly by the sleeve part on the needle base, and the connection between the sleeve part and needle base is tight, the sleeve part will not rebound, security of products is improved effectively.本發明揭露一種針刺裝置,其包括針座和置於該針座內的針頭,該針座上方滑設有第一套件,該第一套件的上方滑設有第二套件;該針座的上表面設有至少一個凸起部,該第一套件的後端設有通孔,該通孔內設有至少一個彈性限制部,當該凸起部移動到該通孔的內壁與該彈性限制部的自由端之間時,該彈性限制部限制該凸起部朝該彈性限制部的固定端移動;該第一套件和該第二套件之間還設有限位機構。本發明的針刺裝置使用後可以快速地使針座上方的套件將針頭蓋住,而且套件及針座之間連接牢固,不會發生套件回彈情況,有效地提高產品的安全性。10‧‧‧針座11‧‧‧凸起部12‧‧‧第一滑道20‧‧‧針頭30‧‧‧第一套件40‧‧‧第二套件45‧‧‧墊層50‧‧‧操作柄51‧‧‧翼狀部
