Giá đỡ điện thoại/máy tính bảng đa năng có thể gập lại

This is a remix of the “Universal phone/tablet stand with adjustable angle” by ClassicGOD, but now it is collapsible, that is it stays closed until you open it manually.

I added a couple of stops to avoid the arms from going to the other side of the piece, tabs to hold the arms in place when it is folded, an additional angle to hold the phone more vertical, and a bit of extra space to the horizontal margins.

I also took a few extra ideas from other remixes of the same original model that are hanging around.

UPDATE v2.2:

• The two top notches are raised a little bit, so that they are somewhat useful (before they had less angle than the other ones.
• Add a small cut to the closed clip so that it can flex and will not break with repetitive opening and closing.