Ergonomic analysis of office furniture

Modern offices must have high-efficiency features, and frequently used items must be within reach to reduce back and forth movement. The design of office furniture should be integrated with the indoor space, so it is necessary to comprehensively consider the office's action procedures, modes, working forms and relevance of each functional area.   The basic functions of office space include: reception, office, meeting, sending and receiving, data storage, information processing equipment and rest.   Today’s office pays attention to comfort, convenience, efficiency and health. It must have complete functions, but not space flexibility and intelligence, and ecological awareness. The design of classic office furniture should not be limited by the narrow traditional furniture concept. Therefore, it is a systematic furniture concept, and the organic matching of products should be considered when designing.  The relationship between tables and chairs is interdependent and inseparable. Whether it is table height or seat height, seat depth, backrest, and seat back angle, all are closely related to the human body size. The chair is a direct, minimal human environment, so it has become a carrier for the realization of aesthetics and technology.   Office chairs are more complicated and require two postures suitable for the human body: upright sitting and relaxed sitting. The front ratio of the    chair can be adjusted to 5″ (125mm), so that it can fit all adults. The size of the seat surface from front to back should be 16″ (406mm). The width of the chair should be 16″~22″ (406mm~560mm). The seat cushion is made of soft material with a thickness of 2' (51mm) without a bottom plate. The horizontal adjustment angle of the seat surface is 0-15 degrees. The adjustment angle of the backrest is 0-15 degrees. The height of the backrest is 25' (635mm) , So as to support the shoulders; when the head needs to be supported, the height of the back of the chair is 36' (915mm); when the hands can reach the back, the height of the back of the chair is 15.7' (400mm). The support center (adjusted from the reference point of the seat surface) is 7'~15' (178-292). The minimum adjustment range is 2' (51mm). The back cushion is curved and made of 1'~2' (25~51mm) thick soft material to prevent it from swaying to the side; too large an arc will compress the lungs and the radius An arc of 40' (1000mm) is more suitable. Chair cushions should be comfortable, breathable, and frictional. Avoid rough, amorphous fabrics. There should be no backrest within 3' (76mm) above the seat surface. This space is reserved for the buttocks. The radius of the round edges of the front edge of the seat and the lower edge of the backrest is 0.5' (12.7mm). The armrest spacing is 19' (483mm), and the armrest width is 2'~3.5' (51mm~89mm). The armrest length is 10' (254mm) from the reference point of the seat forward, and 12' (305mm) when working without desk The armrest pad is made of Luo material, and the radius of the top side of the armrest is 0.5' (12.7mm). The chair should be able to rotate and should have 5 or 6 legs for stability.  The main function of the desk is to provide reading, writing and other office-related affairs, which must conform to the normal human posture.   Office work is usually carried out on a water platform. However, some studies have found that a moderately inclined table is more suitable for this type of work, and there are also examples of using inclined working surfaces in actual designs. When the table is inclined (12-24 degrees), the posture of the person is more natural, the movement of the trunk is small, and the fatigue and discomfort are reduced compared with the horizontal working surface.  The height of the working surface is also one of the factors that must be decided. If the working surface is too low, the back bends forward too much; if it is too high, the shoulders must be raised and walked through its loose position, causing discomfort in the shoulders and neck. Generally, the height of the working surface should be 50mm~100mm below the elbow. For a specific job, the height of the working surface depends on the nature of the job, personal preference, the height of the seat, the thickness of the working surface, the thickness of the working thigh, etc. For fine work, the higher face allows the eyes to be close to the work object for easy observation. In short, the design of office furniture system should follow the principles of flexibility, economy and pleasantness. The most important thing is to take the human-machine scale as the benchmark, tailor-made according to the selectivity and needs of different occupations, and integrate the basic and special functions in the office furniture system. Flexible arrangement and combination make the office system more flexible, convenient and diversified, save space and resources, improve office efficiency, and achieve optimal classic office furniture system function integration, which can give full play to practical effects without losing its comfortable and charming charm.
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