Now comes the assembly of the seat. Let’s start with the so-called 4D armrests. This special design makes it possible to adjust the armrest in four directions to provide maximum comfort and ergonomic support. The height of the armrest can be varied to ensure that the arms rest at an optimum level. In addition, the width of the armrest can be adjusted so that the distance to the seat is adapted to the user’s individual needs. The depth is also flexible, which means that the armrests can be moved forwards or backwards to ensure a perfect position for the forearms. In addition, the armrest can be rotated, allowing the angle to be adjusted to keep the arms in a natural, relaxed position. These four adjustment options help to reduce strain on the shoulders, neck and arms by providing customizable support.
Now we come to the heart of every chair: the seat mechanism. Donati’s Synchro-Tilt mechanism is a sophisticated ergonomic system designed to follow the natural movements of the body while seated. At its core, the mechanism is based on the synchronized movement of the backrest and seat in a fixed ratio, typically 2:1. This means that the backrest tilts 20 degrees, for example, while the seat only tilts back 10 degrees. This coordinated movement ensures that posture is maintained while reclining, the body is supported and the feet remain flat on the floor, which promotes blood circulation and reduces strain on the back and legs.
The mechanism uses a combination of springs and levers that provide a gentle recline and can be adjusted to suit individual body weight by adjusting the resistance. This customization option ensures that the user can find the right reset resistance for them.
In addition, many models offer a function for locking the tilt in several positions to ensure the best possible sitting posture for different activities, such as typing, reading or relaxing. This variant of the Donati mechanism also offers a seat depth adjustment that is suitable for different leg lengths and promotes blood circulation. Operation via rocking flaps is not an everyday feature, but it is a good solution. Just like Donati.
The Donati mechanism not only ensures better ergonomics, but also supports the spine by optimally adapting to the natural curvature, which prevents the development of back pain and tension. The even distribution of pressure on the back and seat prevents pressure points, and the continuous movement promotes the supply of nutrients to the intervertebral discs, which helps to maintain back health in the long term.
This mechanism is used in many high-quality office chairs as it offers an ideal combination of comfort and support, especially during long periods of sitting in the office. Speaking of sitting phases: of course we also need a backrest! What should not be missing is the ever-popular A-fax for your attention. But you can gently pluck it off. Turn the page once, please!
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