| 摘要 |
<p>The invention relates an automatic writing instrument comprising a hollow barrel (1) having a longitudinal slot and lateral sub-slots made therein, a clip slider (5) slidably fitted in the longitudinal slot, and a writing stick (3a,3b) connected to the clip slider (5) so that forward and backward advance of the clip slider in the longitudinal slot may cause the writing stick to appear and disappear from either end (2a,2b) of the barrel (1). The clip slider (5) is fitted in the longitudinal slot so that it may be caught by a selected lateral slot in its stress-free, floating condition, thereby preventing the writing stick (3a,3b) from sliding in the barrel(1), and so that it may be yieldingly depressed in the barrel, thereby releasing the clip slider (5) from the selected lateral sub-slot to permit the writing stick (3a,3b) to slide in the barrel(1). The operation can be effected by a single hand. Advantageously, the automatic writing instrument uses no springs to hold the writing stick in the barrel, thus making it easy to assemble parts into a writing instrument. <IMAGE></p> |
