After school, many parents feel relieved that they can send small naughty skin to school in the daytime. However, I wonder if you have noticed that these daily Desk chairs can match children well?
Class chairs and chairs are the basic equipment of the classroom. Most of the children are close to the desk and chair every day. The inappropriate desk chair will affect the growth and development of the children and harm the health of the children.
The unsuitable harm of the desk chair
01. Influence of vision
The height of the desk chair is one of the main factors that affect the correct writing posture of the students. The height of the desk chair is not reasonable, the students are not comfortable, the writing posture is not correct, it is easy to cause the children to use the eye distance too close, so that the students' eyesight drops rapidly and forms myopia.
02. Influence development
Poor sitting posture can easily cause fatigue in the waist and neck. As time passes, it will lead to spinal deformation, hunchback and cervical spondylosis. At the same time, abnormal bending can also impede the function and development of internal organs, cause the deformity of ribs and thorax, and cause cardiopulmonary dysfunction.
03, influence learning
Non ergonomic Desk chairs are also likely to cause distraction among students, thereby affecting academic performance.
Since the desks and chairs are so important to children's growth and development, do you really know about them?
Let's take a look at some key indicators of desks and chairs.
1, the top of the table: the height of the table from the ground.
2. The height of the seat: the height of the seat from the ground.
3. Under the table clearance height: meet the height of the lower limbs moving freely under the table when seated.
4, height difference between tables and chairs: desktop height minus the height of seat surface is an important factor to measure the degree of coordination between desks and chairs, affecting the sitting posture.
It can be said that at present, there are still many problems in students' desks and chairs. In order not to affect the growth and development of children, what should we do?
1, schools should purchase desks and chairs that meet national standards. When a school purchases desks and chairs, it can determine the number of different types of desks and chairs according to the proportion of height in the current school year.
2, the allocation of desks and chairs should have "size" to avoid "one table to the end". Each class has at least 2 different kinds of desks and chairs, and matches according to the height of students.
3, the principle of matching desk and chair is the matching of class chairs with the same number of desks. For a very small number of students who need high chairs and tables, they can also use low 1~2 class chairs to match desks.
Parents and students: selection of reference standards
1, parents and students can choose the appropriate desks and chairs according to their height according to the national standard "function size and technical requirements of school desks and chairs" (GB/T3976-2014).
Standard height and height range of students' desks and chairs
Note 1: standard height refers to the most representative height of chairs and desks.
Note 2: Students' height ranges from four to five.
2, from the above table, we can see that the top 0 desk is 79 centimeters high, and the lowest 10 desk is 49 centimeters tall.
3, in the standard height of 187.5 cm high school students and 112 centimeters of primary school freshmen, there should be 11 different height of desks and chairs to choose from.