本发明属医疗器械领域，涉及一种笔式胰岛素注射器常规胰岛素专用笔芯结构的改进。
The invention belongs to the field of medical apparatus, and relates to improvement of a general insulin special refill structure for a pen insulin syringe.
当笔式胰岛素注射器笔芯内柱塞推注到终止时，凸型柱塞与笔芯瓶顶部相吻合，充满整个空间。
When injection of an inner plunger of the refill of the pen insulin syringe stops, the convex plunger is tallied with the top of a refill bottle and fills the whole space.
当笔式胰岛素注射器笔芯内柱塞推注到终止时，凸型柱塞与笔芯瓶顶部相吻合，充满整个空间。
When injection of an inner plunger of the refill of the pen insulin syringe stops, the convex plunger is tallied with the top of a refill bottle and fills the whole space.
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