In fact, the specific idea has not been figured out. Another method is that the yellow part is flame retardant ABS, and the two connected modules have a structure to support it to be folded.

The user of the product is the blind. In fact, we should start to study the living habits of the object and their "special vulgar ability", such as the blind guide stick. In fact, they are more sensitive to touch and hearing than ordinary people. Similarly, the blind spot design on the keyboard can be mastered by ordinary people. CN three-phase socket itself with a directional, two-phase not to mention. The idea is good, but there is a lack of user investigation to solve the problem, and there is not enough understanding of the safety requirements of professional products. The designed products can only be non-standard.

In addition, whether it is the material problem or the folding mechanism mentioned by you, it is a serious violation of safety regulations. GB and UL standards have clear regulations. At present, all sockets have safety doors to prevent electric shock, and there is no risk of electric shock mentioned by you.

You are right, but what I think is not comprehensive enough and I have been taught.