The size of the sofa bed is good.
When choosing a sofa bed, don't just consider the appearance and color of the sofa bed. Comfort is also very important, and this is reflected in the size. The size of each part of the sofa should be adapted to the curve of the human body's physiological structure, and it is ergonomic, so that it is more comfortable whether it is sitting or lying.
The height of the sofa bed is preferably between 35 and 42 cm, which is about the height of the person's calf. Too high or too low is not conducive to the relaxation of human muscles. The seat depth is preferably between 48-55 cm. When the back is placed against the back of the sofa as much as possible, the knee should still be outside the seat. From the ground up, the height of the sofa bed back should be between 68-72 cm, the comfort is the strongest in this range. In addition, the inclination of the backrest is preferably between 100 and 108 degrees, and the height of the handrail is preferably between 62 and 65 cm.
The structure of the sofa bed should be firm
Whether the frame structure of the sofa bed is strong is the most important standard for measuring the quality of the sofa bed, and it is also the basic guarantee for the firmness and durability of the sofa bed. If the sofa bed has a wooden frame, it is best to uncover the base lining to see if the wood is clean and the good wooden frame should be free of insects, scars, and ruin.
The "variation" method of the sofa bed mainly includes "flip type" and "push-pull type". Regardless of the method used, in the "variation" process, the hand should be smooth, the resistance is moderate, and the various parts are stable after being in place.