SPRING STRUCTURE FOR SUPPORTING MICRO BALL OF BALL PEN IN ORDER TO STABLY MAINTAIN CENTER BETWEEN MICRO BALL AND SPRING

摘要

PURPOSE: A spring structure for supporting the micro ball of a ball pen is provided to stably maintain the center between the micro ball and the spring supporting the same and prevent the spring from being jammed. CONSTITUTION: The spring structure provided within the tip(120) of a ball pen and for elastically supporting a micro ball(125) comprises: a coil-shaped main body section(100) having pitches of a predetermined gap; a sloping section(105) extended in a coil shape integrally from the front end of the main body section(100) and tapered in a manner that the diameter decreases gradually in the front end direction; and a coil-shaped pressing section(110) extended integrally from the front end of the sloping section(105) and directly contacted with the micro ball(125).