Top Coat And Base Coat,Top Coat Nails,Matte Top Coat,Gel Top Coat GuangZhou CCO Cosmetic Co., Ltd , https://www.nailcocome.com
The Chinese chair takes into consideration the comfort and standardization of sitting posture. "Many people think that classical furniture is not comfortable to use. Practicality and comfort are the most basic requirements for furniture. Redwood furniture is not included. The ancients pay attention to the station. There is a sitting and sitting, and you can't lean against it.", Zhang Baozhong, chairman of Yujinxuan Redwood, said: "Our ancestors are very wise, and the production of Chinese mahogany chairs is highly comfortable with the comfort of sitting. Normative. Some of its designs will make you seated very comfortable, and it is very uncomfortable to sit in a slanting position."
Chinese classical chair is comfortable regardless of sitting height and sitting depth. According to Zhao Hua, general manager of mahogany furniture, the Chinese mahogany chair has a certain degree of attention. It needs to be designed according to people's different sitting postures. We can see from the standard size of the mahogany chair, no matter its sitting height, sitting depth and so on.
Sitting high so that you don't hang up and sit down is the vertical distance from the seat to the ground. Appropriate sitting height should keep the thighs level, the calves vertical, and the feet flat on the ground. If the seat height is too high, the two legs will vacate the thigh blood vessels; too low will cause the body to lean forward. The appropriate seat height is from the calf to the plantar height plus the heel thickness of 25mm-35mm, minus the 10mm-20mm balance. Namely: sitting height = calf height + heel thickness - appropriate clearance. The national standard GB 3326-1997 specifies: the sitting height is 400mm-440mm, and the size difference is 10mm.
Sitting deep does not exceed the length of the thigh. Sitting depth refers to the front to back distance of the seat. If the mahogany chair is deeper than the horizontal length of the thigh, the backrest of the human body will have a large inclination, and the waist will be suspended without a support point, which will aggravate the muscle activity of the waist and cause fatigue; at the same time, the sitting surface is too deep, so that the knee socket It produces numbness. The average length of the thigh in the sitting position of our human body is 445mm for men and 425mm for women. Then we ensure that there is a certain distance (about 60mm) from the inside of the knee when sitting in front of the knee. In general, the sitting depth is between 380mm and 420mm.
The sitting surface also has a comfortable inclination. When the person is resting, the sitting posture is leaning backwards to support the lumbar vertebrae, so most of the general sitting faces are designed to be inclined backward. The inclination of the seat surface is generally 3 to 5 degrees, and the opposite seat back is also inclined backward.
The size of the backrest allows most people to sit comfortably. The size of the backrest is mainly related to the height of the bottom of the buttocks to the shoulders (determining the height of the backrest) and the width of the shoulders (determining the width of the backrest). The height and width of the backrest of the chair, the maximum height of the backrest can reach 480mm~630mm, and the maximum width can reach 350mm~480mm. This size allows people of different sizes to sit comfortably.
Sitting and sitting: the correct sitting posture should be straight back or back. According to the party doctor of Shaanxi Provincial Hospital of Traditional Chinese Medicine, Party Jianjun introduced that there are many people who come to the hospital for pain in the waist every day. Most of them are due to long-term sitting posture. caused. Poor sitting posture for a short period of time does not cause substantial harm to human health. Long-term sitting habits are poor, and it is easy to cause damage to the waist muscles and lumbar vertebrae, causing local pain.
Poor sitting posture has a greater impact on three types of people: First, people with related lumbar disease, short-term sitting posture can cause discomfort; Second, children and adolescents in development, long-term sitting posture may lead to scoliosis, bending The phenomenon of lumbar hunchback; the third is long-term office professionals, if you do not correct the bad posture can also lead to diseases such as lumbar disc herniation.
He believes that the correct sitting posture is actually very simple, that is, to keep the back straight, or to rely on the back. Like the "Ge You Li" posture mentioned in the network, it will cause the waist to be unsupported, and the lumbar vertebra will be more stressed. This habit has long been a cause of damage to the lumbar spine.
We are often asked by the elders to "sit and sit". Although most of them are from a ceremonial point of view, they are also very correct from a health point of view. If you lie down, lie well, if you sit, sit down. Long-term half-lying and semi-sitting posture is not conducive to health. Sitting on traditional Chinese solid wood furniture is indeed conducive to the development of correct sitting posture. If you feel too hard, you can add a cushion or cushion to make your back.