| 摘要 |
<p>The present invention aims to enable a user of a ballpoint pen to use an ink longer by using a spring in an ink tube when the user uses the ballpoint pen. A ballpoint pen of the present invention is formed to be thin. When the ink tube is manufactured, the spring is inserted in to the ink tube; the ink of the ballpoint pen does not simply drop in the vertical direction but drops in a spiral motion; and thus a less amount of the ink drops to a tip of the ballpoint pen. Therefore, the ballpoint pen enables the user to use the same with a little amount of the ink; can have extended time of use; and enables the user to save resources as the ballpoint pen can be used for a long period of time.</p> |
