This is one of the most commonly-used hand bag. Structure can be quickly drawn if you know the box structure of the overall size (length, width, height) . The following points are needed to pay attention to:
1, Stick line is always consistent with sticky surface,so wherever the glue tap , stick line with the main face is a coincidence after the glue. The first picture of the glue is on the left, if the glue tap is on the right, the line will change ( as the following figure).
No matter where the glue tap is , as long as to ensure after the final molding, the stick line is overlapped with the main face.
2, F2 is greater than W / 2, less than W: W / 2 < F2 < W, the sizes of the other places are very simple.
3, But sometimes because of big size, it is divided into two parts, pull out and then paste together, as shown in the figure below:
When split it, you should also pay attention to glue line drawing which need to be overlapped with the body face.
This is the 3D structure.
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