Office furniture, Answer:
Usually we normally there are three physiological curvature of the spine of the body, because of the physiological demand they don't grow on a straight line, thoracic vertebra backward protruding, cervical vertebra and lumbar vertebra protruding forward, look from flank, cervical vertebra are like two S connection.As a result of this physiology characteristic, waist, back cannot be placed in the same plane, therefore, if you want to achieve a comfortable sitting position, the back of the chair design should accord with the nature of the spine curve.To keep the cervical vertebra, lumbar lordosis and thoracic vertebra protruding after.  So, gavee ergonomic chairAccording to the human body structure and reasonable design computer chair, computer chair must back to the human body should have the following three points:1, head and neck have adjustable neck pillow for lordosis of the cervical spine.2, upper back has adjustable curved surface of the protruding after thoracic support.3, centre-backs have adjustable waist cushion of protrusion of lumbar support. So that the three parts of the full support to ensure that the user at the computer chair sit straight colleagues keep the curve of the spine, avoid the deformation of the spine.  A: next we from top to down under scientific analysis, the first us neck collar.For users need often back to relax the head and neck, neck collar height and Angle to grandma cervical fatigue, reasonable neck collar height neck collar should be adjustable in the third quarter of cervical vertebra to the section 7 cervical vertebra get don't support, effectively relieve the tiredness of the cervical spine.But as a result of each size is differ, a lot of fixed neck collar is not in the position of the user needs, user base that is counterproductive for comfort, therefore, the seat is must have a neck collar, its height, depth and pitch Angle is adjustable, such as the T05 was designed using 4 d.  2: we through scientific analysis of the chair back, neck and waist is defined for the comfort of your thoracic vertebrae, cervical vertebra bone and (fatigue.So the Angle of the back of the chair and surface should be adjustable and the neck.Back and waist have good support,Also has a moderate elevation Angle is adjustable, can make the person body weight of the part is lean back to share in the back of the chair, without fully borne by the cervical spine, and nature is helpful to health for this chair back stretch, also should be easy to tilt, but not too easy to tilt.At the same time of the chairWith appropriate flexibility, can be completed in a range of recoverable shear deformation, and in order to adapt to frequent users back posture change.Can say so much you make you feel dizzy, the small make up teach you experience is the most straightforwardIn when choosing computer chair can straight waist, abuts on the back of the chair, still feel very comfortable, if a quarter of an hour, the thickness is suitable, if feel back fatigue and pain, then the back of the chair is not qualified.  3: long time sit at the computer chair feel lumbar acerbity backache.This time is chair of the waist support is criticalImportant.The waist position title should be in the body of the third section, four, five, the location of the lumbar spine, at the bottom of the chair back of a chair is best can slightly convex or with adjustable waist, can be most effectively, make the waist to maintain the proneness physiology of the lumbar spine, balanced lumbar, lumbar muscle stress, ease strain, increase comfort, prevent and improve lumbar discomfort.  Four, computer chair, the depth of the seat cushion should be deep enough and can be adjusted.The proper depth of the seat cushion is the prerequisite of hips don't tired, you should be hip sit in the seat cushion in place, the most deep and adjust the seat cushionDegrees, make its seat cushion can effectively support the thigh area of more than 70%.When leaning backwards or forwards in front of the consumer body, seat cushion edge can bend at any time, in order to release the pressure of lower thigh, promote blood circulation of lower limbs, and won't produce skidded off the seat.  Five, the computer chair armrest height, width, depth and Angle should be comprehensive regulationDon't fit the armrests height of shoulder quickly fatigue to children.Because when using the keyboard, upper arm and forearm to maintain the health of 90 to 105 degrees Angle, will have to live the armrest of moderate support.Due to the right hand madeAround with different conditions, the height of the armrest should be regulated respectively, after the adjustment to the appropriate location, there should be a locking device fixed armrest lock to prevent bounce or slide.    Six, computer chair chassis should be thick and stableIn order to increase Office chair The work efficiency.From practical use and economy to consider, how to install wheel chair Angle design of claw type instead of disc type, chair Angle of the base material is also the need to focus on problems, high quality products are usually stainless steel or aluminum alloyGold material, has a certain weight, to ensure the stability of the chair.    Seven, comfort breathable safety side of material is very importantFabric permeability is good, friction, downy, the chair of textile material surface material should be our first choice.  Eight, computer chair lift rod inside the bar should be safe and reliableChoose the computer chair, in addition to pay attention to support axial and rotational flow, is responsible for the chair lift parts in the axis, and tested to recognizeQuality guarantee certificate, so we most should pay attention to the quality and performance.