However, the fibers on the toothbrush are not so wear resistant to mechanical factors. Regarding the cleaning mechanism, engineers initially looked at elastic materials like fibers on a toothbrush that can adapt to the shape of the tooth.
When the opening angle is 90 °, the cams are in contact with the flat part of the surfaces, and in the fully opened state (180 °), the upper cam goes to the other side of the slope, and the spring provides the corresponding tension, reliably fixing the hinge in this position. When opened, the upper cam begins to slip. When folded, the spring presses on the cams, providing a reliable fixation of the device. It consists of two cone-shaped cams with a flat top at both ends of the hinge and spring.
The key component of the Galaxy Z Flip hinge, thanks to which the smartphone unfolds and holds the position at different angles, is a comb-like two-jaw mechanism. The Galaxy Z Flip hinge device is shown in the images below: So, creating the Galaxy Z Flip, the engineers had the non-trivial task of creating a compact and reliable hinge with a smooth ride, and also come up with a way to prevent small particles, such as dust and sand, from entering the tiny gap between the hinge and the screen. In a large two-part material, Samsung described its design in detail and explained in pictures how it works. Perhaps the key, providing the very possibility of creating a device of this form factor, is a hidden articulated mechanism (Hideaway Hinge), which allows not only to open and close the screen, but also to fix it at different angles. Not so long ago in Ukraine, sales of Samsung Galaxy Z Flip began – an unusual and very expensive clamshell with a flexible screen, in which the engineers of the South Korean giant implemented several innovative solutions.