Safety indwelling needle

A safety indwelling needle, comprised of a soft outer needle to be inserted and placed within a blood vessel, a hard inner needle, with an inner needle hub, which is fitted in the outer needle, pierces the skin of a patient to introduce the outer needle into the blood vessel and a holder sleeve having an open distal end and a closed proximal end and capable of holding the inner needle, wherein:

• the holder sleeve incorporates an urging means for urging the inner needle toward the proximal end side and an actuator which engages the inner needle at a near distal end portion of the holder sleeve so that the inner needle can be released and a tip of the inner needle is projected from the holder sleeve;
• the actuator has an inner needle hub fixed at a front end thereof and is formed with an actuating member projected outside the holder sleeve;
• the holder sleeve has a slit which extends to the proximal end side of the sleeve so as to hold and allow the actuating member of the actuator to slide and assures a path of movement of the actuator released from the near distal end portion of the holder sleeve;
• and
• the inner needle is adapted to be released from the holder sleeve when the actuating member, to which applied is a lifting force directing away from an axis of the holder sleeve, is moved away from the holder sleeve within a same plane that includes the axis of the holder sleeve.