03-07-2015 дата публикации
Номер: KR1020150075339A
Принадлежит:
The present invention relates to a ruler underlining lines on a book or a note using a highlighter, a pencil, or other writing instrument to highlight important content when studying a writing instrument holder wherein a writing instrument is inserted, and underlining using the writing instrument; a roller body functioning as a ruler to enable the writing instrument holder to linearly underline, and joined to the writing instrument holder; a guide rod installed inside the roller body, joined to the writing instrument holder, and guiding the writing instrument holder to linearly move in a longitudinal direction of the roller body; and a writing instrument holder returning spring wherein the guide rod is inserted, and applying a force automatically returning the writing instrument holder to a left side after the writing instrument underlines from the left side to a right side. The underlining learning tool of the present invention obtains high practicability by enabling a user to underline ...
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