| 摘要 |
<p>The present invention relates to a compass that allows a user to correctly draw a circle without shaking the central bar and a rotation bar, by having a handle provided at one side of a central bar. The compass includes a head portion; a central bar hinged to the head portion on one side, and having a fulcrum needle at the other side which serves as a reference axis; a rotation bar hinged to the head portion at one side to face the central bar, and having a pencil fixing portion for fixing a pencil on the other side; a coupler installed to one side of the head portion in a direction perpendicular to the central bar; an eccentric shaft installed to an upper portion of the coupler in the same direction as the installation direction of the central bar so that the shaft is offset from the central bar serving as the reference axis and an eccentric handle connected to the eccentric shaft to rotate. The coupler has a first hollow coupler connected to one side of the head portion, a second coupler moving in or out from the first coupler to adjust the total length of the coupler, and a coupler fixing member provided on the first coupler to fix the second coupler, so that the length of the coupler is adjusted to control positional movement of the eccentric shaft.</p> |
