lighting sharp for correct writing

摘要

This Bamryeong relates to a writing instrument in which a sharpener and a light bulb are combined, and more specifically, it refers to a writing instrument in which the sharp and light bulb are arranged in both directions. There are thumb, index, and middle finger switches in the switch installation part that make up the sharp so that you can easily grip the sharp. When the switch is pressed, the light bulb in the bulb installation part lights up, so you can use the sharpener correctly. It is a special response to know whether you are holding it.