| 摘要 |
PURPOSE: A ballpoint pen with a pen core device which comes out by being pushed is provided to enhance convenience of users. CONSTITUTION: A ballpoint pen with a pen core device which comes out by being pushed has an insertion hole at the lower part. A pushing device(21) is installed at the insertion hole. The pushing device is composed of metal or non-metal and is connected to ink tubes(23). The ink tube is moved by the movement of the pushing device. The protruding portions(28) are located at the lower end of the ink tube. The pushing device has a protrusion(26) at the inner lower end of the ballpoint pen. If the pushing device is pushed down, the protrusion at the inner lower end is fitted in a groove(27) in the inner lower side. If the pushing device is pressed, the pen core is pushed in by the elastic force of the spring. |
