Ultra Supple Bus

- 07.06.2013

This project aims at preventing a connection from external impacts. It is composed of two ports complementary to those used in the connection and a flexible part (a spring). The two ports and linked using wires which come through the spring.


Here is the first prototype I built. I first thought about protecting connections with a ball joint.

This prototype have several faults. It doesn't work with laptops and it is not conceivable.
You can see on those pictures that the prototype is in two separated piece. It was expected not to be dismantled (cemetery assembly using 3D printing). This prototype is a fail.

First prototyp

This is the first real prototype I've built. It is made up of a tension spring, a male & a female USB port and a receiver piece for each port. Those receiver pieces were 3D printed. The backlash between the receiver pieces and the port is tight. The two end pieces which are used to weld the ports with a plate (not the wires) have been cut.

The backlash and the assembly are the two biggest problems of this project.

As you can see on the last picture, this prototype is not fully operational: the spring can slide because of a wrong calculation of the play.

2nd prototyp

This prototype is a improved version of the previous one. Only the female piece has been replaced by two supplementary pieces. This enable the assembly to be done correctly. Moreover, a additionnal shape to the spring exists. The spring is placed in this shape in order to enable the spring to get back to its orignal position.

This prototype is fully operational. Its price is almost 5€ (5$) (homemade).
The most difficult part is to choose the wire length : the system must be able to move but must take less place as possible.

NB: a mistake has been done while making this prototyp. In fact, the male port has been placed into pieces made for a female port.
This prototype doesn't work at its full potential.


Others similar solutions exist : flexible wires or extension cables.
This project is original because it doesn't hinder the access to the flash drive : it is always in the same position, even after an impact. The connection place doesn't change. In the case of a totally flexible connexion, the flash drive is pressed against the computer and stays sensible to frontal impacts. Last, this system is easy to make and to customize.

Go further

This system can be easily adapted to other ports (jacks, SCART, VGA, ect...).
It can also be customized, as smartphones' cases, in order to give your flash drive a cool look.

The system could also be embeded to computers. I'm actually working on this concept, this screenshot is only a sketch.

Last, this device could include receivers in which different ports could be plugged (ex : jacks of differents sizes).

List of used material


Make sure you see the zigzag either on both ports, either on none (as shown here).