产品名称：手胀轴

手胀轴是一种基于螺杆机械原理设计的轻型悬臂式卷轴装置，通过旋钮驱动实现轴体膨胀/收缩功能，专为轻质材料快速换卷需求而研发。适用于短轴距、低载荷的包装、标签、薄膜等轻工业场景。

Hand expanding shaft is a lightweight cantilever reel device designed based on the principle of screw machinery, which achieves the expansion/contraction function of the shaft body through knob drive. It is particularly suitable for light industrial scenarios such as packaging, labeling, and film with short wheelbase and low load.