| 摘要 |
<p>A writing instrument includes a writing tip for applying ink to writing mediums, a first ink tank for supplying ink to the writing tip, a fixed base for holding the writing tip. It also includes at least one additional ink tank filling with ink and at least one opening device. The opening device is used to open and guide the ink in the at least one additional ink tank to communicate with the writing tip, so as to supply ink to the writing tip. The present invention can realize the objects of improving its storage capability, prolonging using time and preventing it from leakage effectively.</p> |
