I wanted to make a phone stand for my car, but after looking at other designs, I noticed that most phone stands were made to fit in the air conditioning vents or on flat surfaces. I wanted to create a phone stand that could fit on a curved surface without being too specific to one type of car.

Using the property of thin layers being flexible, I made a thin layer as a base to start off.

The base should be mounted with some sort of adhesive. I used transparent double-sided tape to stick it to the surface of my car. You can use this stand on flat surfaces too, as long as there is enough friction on the bottom side to keep the stand in place. The weight of the phone creates a moment in the part, which is countered by the pulling force on the opposite side of the part.

Personally, as a mechanical engineer, I found the screw/nut design appealing. However, because of the horizontal way the screw and nut are printed, the layer structures create too much friction to properly screw on, so I only needed the working half. This video somewhat captures what I mean by this: Why Your 3D Printed Threads Don't Work.

My first prints failed because the threaded base ripped from the main base, so I added a chamfer. Additionally, the range of the ball and cone connection was too small, so I added a curve using a loft. The stand is connected to the lofted cone by screwing a simple 12mm screw into the phone stand to ensure a firm connection.

[update]

Print the Ball and cone structure on the side to account for shear forces, bu letting the layerlines go in the full length the structure will be stronger. for reference, see the attached photo.

Print Settings

• Printer: Flsun V400
• Rafts: Doesn't Matter
• Supports: No
• Resolution: 0.2mm
• Infill: 10%
• Notes: Assembly requires an adhesive and a small screw