| 摘要 |
An ink cartridge selection control mechanism of a multi-ink cartridge writing apparatus, including a plurality of slides fixed to the ink cartridges which are slidably moved in a respective sliding slot on the barrel of the pen. A plurality of springs are mounted around the ink cartridges between the slides and a locating block inside the barrel of the pen. When one ink cartridge is moved by one slide to the extended position for writing, the rounded end of the respective slide is forced into engagement with an expanded, tapered hole at one end of the respective sliding slot to lock the respective ink cartridge in the extended position. When a second ink cartridge is moved toward the extended position, the slide of the extended ink cartridge is forced outwardly to release the extended cartridge from the locked position.
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