Beach chair design, according to the characteristics of the human body to customize

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Beach chair design, according to the characteristics of the human body to customize

Qizhenbi
<p> The local shape and scale of the beach chair have a great influence on the use. The height of the backrest and the handrail. From the human anatomical characteristics of consideration, the human buttocks muscles thick and solid, is one of the most tolerable parts of the human body. So the appropriate seat should be designed so that the upper body of the center of gravity on the buttocks on the bones.</p>
<p> (A) sitting too high to sit too high so that the legs are vacant, not only the leg muscles under pressure, and the upper leg, lower leg and back muscles were pulled state, it will not take long to fatigue.  </p>
<p>(2) When the sitting surface is too low When the sitting surface is too low to the knee or less than 90 ° when the body pressure is too concentrated, abdominal muscle compression can not guarantee the waist of the Ministry of the Ministry of the waist of the appropriate state, affecting the back muscles, increased Back muscle load time, will cause pain and discomfort lead to fatigue.</p>
<p> (C) the width of the sitting surface, refers to the front side of the length of the sitting surface width is too narrow, in addition to feel can not be properly used, the muscles on both sides of the body will be squeezed feeling; , Arms must stretch outward, so that latissimus dorsi and shoulder deltoid muscle tendon tissue was stretched. Both of which are prone to fatigue.  </p>
<p>(4) the length of the backrest dynamic range of large, can not be back; static work and dynamic rest to get the appropriate support without prejudice to work and activities is appropriate, back height can be lower by the first, two lumbar spine began to gradually increase, The highest can reach the scapula, neck; and static rest can require the length of the backrest to support the head. </p>
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