SAFETY INJECTION NEEDLE

PROBLEM TO BE SOLVED: To provide a device having a cap with a spring, which is attached to an injection needle, is installed by a cap stopper, moves to the tip by elastic force of the spring caused by detachment of the cap stopper stopping a cap flange-like part by pulling a handle part downward after use, covers a tip part, and prevents projection of the needle again to secure safety. SOLUTION: In the cap 3, a needle stopper 10 in the tip is formed with a needle hole 7 and a vertically openable penetration groove 9 such that the needle hole 7 of the tip needle stopper 10 of the cap 3 is formed slightly below a needle hole 7 of the cap 3. The cap 3 is installed to the spring 2, is inserted through the needle 8 provided in a body part 1, and is fixed to a root. The needle stopper 10 is slightly pushed up while inserting the cap 3 through the needle 3. The needle hole 7 of the needle stopper 10 is aligned with the needle hole 7 of the cap 3, the cap 3 is pushed toward the root of the main body part 1 while inserting the needle 8 through the cap 3, and the cap 3 is installed by the cap stopper 5. COPYRIGHT: (C)2004,JPO