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发明公开
CN107776253A 能看笔芯墨量的笔 无效 - 撤回

能看笔芯墨量的笔
摘要：
本发明提供一种能看笔芯墨量的笔，所述的笔在笔杆中设有一条透明块，这样我们平常使用时，就可以看到笔芯里的墨量，让我们随时知道换笔芯，避免出现写着写着没墨水的尴尬。
摘要（英）：

The invention provides a pen with a visible ink quantity in a cartridge. The pen is provided with a transparent block in a pen holder; and in this way, the ink quantity in the cartridge can be seen during usual use, so that a user can be reminded of changing the cartridge at any time, and the embarrassment of no ink during writing is avoided.

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