Smartphone Stand #2 (V-shaped)

This is a very thin folding smartphone stand.

[Remaining problem]
The hinge part may loosen little by little when using it. When the smartphone is in this state, the stand moves to narrow the V-shaped angle and becomes unstable.

[size]
height: 21.5mm, thickness:6mm, length:68mm

[screws to use]
M3 CAP 18mm x1
It is recommended to use glue to prevent the screws from loosening.
No nuts needed.

[print conditions]
-printing type: FDM
-printer: Original Prusa i3 MKS
-filament: PLA
-support: yes
-brim: no
-raft: doesn't matter
-print directions: please refer to the photo

[revisions]
2022/03/28
I change the hinge shape.
I'm sorry, the photos are still the old version.

2022/03/27
I change the print directions and I changed the fine shape.

2022/03/27
The top and bottom chamfers have been made slightly larger to make it easier to open.

2022/03/26
I made the length a little longer. And I narrowed the slot a little.

2022/03/25
I changed the shape of the