Principles of material structure selection of desks and chairs

Release time：3/19/2022 5:28:02 PM

　　First, the principle of material structure selection of desks and chairs
　　(1) The selection of desks and chairs

　　Classroom desks and chairs commonly used materials include: wood, metal, plastic, synthetic materials. In the design process of desks and chairs, the functions and requirements of different parts are different, therefore, the selection of materials can not be uniform, and different materials should be selected for the functional differences of different parts.

课桌椅

　　Because the plastic inevitably contains substances harmful to the human body, long-term use will endanger human health, therefore, in the primary school desks and chairs, the parts with the most close contact with the user, such as: desk desktop, seat surface, seat back, these parts choose wood without chemical processing.
　　Wood is a natural material suitable for human use, but its price is higher, if you take into account the cost of the problem, you can use a lower cost of wood-based panels.
　　Since the legs of the table and chair are generally not in direct contact with the human body, wood is not used, which can reduce costs. At the same time, the table legs and chair legs are the main load-bearing parts, and materials with greater support strength need to be selected.
　　Plastic hardness is not high, and the longer the use of time, the more prone to aging, brittle phenomenon, so it is not suitable for table legs and seat legs. The material of table legs and chair legs is generally metal material. The strength and hardness of metal materials are large, not easy to deformation, welding and bending are easier, and can meet the needs of arbitrary shape and modeling structure.
　　(2) The structure and material performance requirements of desks and chairs
　　The age of primary school students is about 6 to 12 years old, and children in this age group have poor self-control and are easy to cause damage to desks and chairs artificially.
　　Therefore, in the selection of student desks and chairs materials, in addition to considering the applicability of the material, should also consider the service life of the material, strength, hardness and other physical mechanical properties. In addition, the structural design of desks and chairs should also have strong stability, so as to limit the occurrence of dangers. According to the relevant regulations of the state, the mechanical properties of the structure and materials of desks and chairs should pass the following tests, including: static load test, fatigue load test, functional load test, and non-functional load test. The specific test method can refer to the national standard "Furniture mechanical properties Test" (GB/T10357).
　　Second, the problems of primary school desks and chairs
　　1. The size of desks and chairs does not match human physiological parameters
　　At present, most of the domestic primary schools are divided into 6 grades, the age of students is about 6 to 12 years old, in this age stage, the size of the human body span is obvious, and the body gap of students in the same age is also large, which puts forward higher requirements for the structure and size of students' desks and chairs. However, at present, most of the students in all grades of primary schools in China use the same type of desks and chairs, which leads to the mismatch between the size of many desks and chairs and human physiological parameters. In addition, at present, most primary and secondary schools in China refer to the "functional size of school desks and chairs" (GB/T3976-2002) to select desks and chairs, which cannot be applied to some students with special bodies.
　　2, The use of desks and chairs is poor
　　At present, most of the desks and chairs used in primary schools in China are hard materials made of wood or steel, and the structural design is relatively single, does not conform to the curve shape of the human body, and it is easy to produce fatigue for a long time. How to design ergonomic desks and chairs that meet the physiological characteristics of the human body is a problem to be solved.
　　3, The function of desks and chairs is too simple
　　At present, the desks and chairs used in most schools only have basic functions such as sitting, reading, writing, and drawing, which can only meet the basic learning needs, and in some special cases, the size, height, tilt Angle, and space size of the desks and chairs can not meet the actual needs. With the increasing complexity of students' learning process, the traditional single-function desks and chairs obviously can not meet the needs of students, and it is urgent to optimize and improve.
Article by: desk and chair www.sdfumei.com Fumei seat Co., Ltd. arrangement provided, the views of this article do not represent the views of this site

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Principles of material structure selection of desks and chairs

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