As an important rest and relaxation furniture in the home, the ergonomic design of sofa is crucial and related to the comfort and health of users.
First of all, the design of the backrest is the key. For different sitting postures, the backrest needs to provide multi-directional support. When the user is sitting upright, the backrest should fit the natural curve of the spine, especially the waist position, and have a moderate convexity to support the lumbar spine and relieve the pressure on the waist. For example, the use of a backrest structure with adjustable angle and height can meet the needs of people of different heights. In a semi-reclining sitting position, the upper part of the backrest should be able to comfortably support the head and neck, and the angle should be adjusted to allow the neck to stretch naturally to avoid excessive bending or stretching of the cervical spine. This function can be achieved by setting an adjustable headrest on the backrest, and the hardness of the headrest should be moderate, with a certain degree of support but not too hard to cause discomfort.
Secondly, the design of the seat surface cannot be ignored. The seat surface height should be appropriate, generally between 40-50 cm, to ensure that the user's feet can naturally touch the ground and the legs are bent at about 90 degrees. For those who like to sit cross-legged or with their legs straight, the seat surface can be deepened appropriately, and the front edge should be slightly curved to avoid compressing the leg nerves and blood vessels. The hardness of the seat surface also needs to be carefully considered. If it is too hard, it will cause excessive pressure on the ischial tuberosity, and if it is too soft, it will lack support and easily cause the body to sink. The filling method of combining multiple layers of sponge or memory foam with springs of different densities can provide a comfortable sitting feeling while maintaining good support and adapting to the distribution of body weight in different sitting postures.
In addition, the design of the armrest should fit the arm movement. When sitting upright, the height of the armrest should be close to the height of the elbow when it naturally droops, and the width should allow the arm to be placed naturally and have a certain amount of space for movement. When the user leans on the armrest sideways, the armrest should have sufficient length and curvature to support the arm and shoulder and reduce shoulder pressure. For example, the use of a rounded and slightly outward-tilted armrest shape can better adapt to the needs of leaning at different angles, so that the arm can be comfortably supported in various sitting postures.
Finally, the overall adjustability and flexibility are important factors in improving the adaptability of the sofa. Sofa can be designed to be adjustable in multiple parts, such as the backrest angle, seat height and depth, to meet the changing sitting postures of different users in different scenarios such as reading, watching TV, and resting. In addition, the various parts of the sofa should be firmly and flexibly connected, so that when the user changes their sitting posture, they can naturally follow the body movements and provide continuous and comfortable support to avoid affecting the user experience due to stuck or stiff parts. Through scientific and reasonable ergonomic design, Sofa can provide accurate and comfortable support for various sitting postures, creating a healthy and comfortable home living environment for users.
