Fire Spear with Hinged Armor-Switching Capability, Printable on A1 Mini

Design Concept: Traditional Chinese spears feature red tassels, a deeply ingrained image reinforced by cinematic portrayals. However, existing models of the Huojian spear omit this detail. I believe "the spear's shadow" and "the sword's song" represent the romanticism of Chinese martial arts culture, and a spear's shadow cannot exist without its "tassel". Therefore, I created this model, hoping to inspire others to further refine the Huojian spear's design. After all, the "spear's" position as king among weapons is an unshakeable historical legacy. I am deeply passionate about spears.

As I primarily utilize SolidWorks for modeling, I rarely undertake designs with intricate curves—my resources, both personal and computational, are limited. However, my fondness for the Huojian spear motivated this creation.
This design features five petals per layer, each rotated 15 degrees axially to minimize interference. The intended effect is that when the spear is in motion, the petals, like red tassels, gracefully unfurl and dance, lending the spear greater dynamism.

Minimal supports are required during printing, and they are easily removed

Assembly requires fifteen M3-20mm screws and corresponding nuts

Additionally, adhesive is needed

Compatible with 25mm outer diameter tubes. These can be inexpensively purchased online, and the STL file includes the tube design. Alternatively, you may print your own—a section approximately 180mm long is suitable for the A1 mini. The Z-axis can be scaled to adjust length. The provided tube features locating pins for customization.

Update: A new spearhead with added textures has been added (updated in the 3MF file)

Update: The spear's rear section has been added (updated in the 3MF file)
Update: An 180mm shaft has been added (STL file uploaded)

Assembly Instructions:

The structure is straightforward. The petal-like tassels are arranged in three layers, each with five petals, secured to a central ring by screws. The three rings are identical in structure, with locating clips between them to maintain angle and minimize interference. The outermost petals are slightly larger; the two inner layers are equally sized. Attach petals with screws and assemble onto the tube.

The inner diameter of the central ring is 25.5mm, accommodating the tolerance of the tube. My testing has shown an excellent fit, securing well even without adhesive; however, adhesive is recommended.

The strength of 3D-printed knives cannot be guaranteed and they are suitable only for light-duty tasks, such as cutting paper or opening Amazon packages. Unless otherwise specified, all of my knife designs are intended for light-duty use only.

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