PEN AND ERASER USING MAGNETIC FLUID

摘要

PURPOSE: A pen and an eraser using magnetic fluid are provided to improve the convenience by controlling the outflow of magnetic fluid by external force. CONSTITUTION: A pen using magnetic fluid(100) is composed of a case(120), a magnetic fluid storing part(130) for supplying the magnetic fluid through an discharge port after receiving magnetic fluid through an injection port, a magnetic fluid stopper which is detachably connected to the injection port of the magnetic fluid storing part, and a writing part(140) for discharging the magnetic fluid to the outside. The magnetic fluid is composed of a nozzle(141) connected to the magnetic fluid storing part, a bearing(142) arranged in the lower part of the nozzle, and a spring(143) elastically supporting the bearing in the nozzle.