How To Choose Liftable Office Chair?

There are many terrible events occurred recently including the broken base, the casters falling off, excessive formaldehyde and even explosion due to the pneumatic rod of liftable office chair. So it is important to choose a qualified office chair for yourself. Let’s take a look at how to select an office chair.

 

 

Standard for purchasing office chairs

 

Office chairs sold in the market can be roughly divided into three categories: e-sports chairs, boss chairs and ergonomic chairs. Let's first look at several dimensions of office chairs tested by AQSIQ, and find out these points, so that we will naturally know the purchase criteria of a good office chair.

 

• Pneumatic rod

 

The biggest potential safety hazard of products such as office chairs is air pressure rods, and unqualified air pressure rods have the risk of explosion, which is the most serious and the most harmful to users. The principle of air bar is simply that there is a cylinder and cylinder in the lifting chair. Open the valve, and the cylinder is linked with the cylinder to release the pressure, so that the cylinder can be adjusted up and down. When the valve is closed, the cylinder gas is locked due to air pressure. Generally speaking, the piston rod in the cylinder moves up and down to control the lifting of the swivel chair by adjusting the air pressure.

 

Factors affecting the safety of air pressure rod First of all, the air pressure rod is filled with inert gas. If the purity of the gas is not enough or other substances are mixed, it may explode in high temperature environment. Generally speaking, when the purity of nitrogen reaches more than 90%, it can ensure safety. Second, the material workmanship and quality of the air pressure rod itself, the tube wall of the air pressure rod is too thin and aging after long-term use, which may also cause explosion. Third, the sealing is not true, resulting in gas leakage, although it will not cause explosion, but it will make the activity function invalid.

 

When choosing, choose the air pressure rod of big brand. The main big brands in the market include KGS and Sanhong in Korea, Wright and Xieqiang in China. Then check whether it has passed the quality certification, generally with SGS/BIFMA/TUV certification, and good air bar shells have certification stamps. Air rods are divided into four grades, so don't buy air rods with grade one or two or even no grade, which is unsafe. At present, all the air rods that meet the standards are three-stage air rods or four-stage air rods, and class 3 or class 4 are generally marked on the air rods. The difference between the four-stage air rod and the three-stage air rod is that the four-stage air rod is heat treated. In terms of use, there are three levels that are completely competent.

 

When using at the same time, do not frequently adjust the height or rotate the chair, so as to avoid overheating of the wall of the air pressure rod and causing potential safety hazards.

 

• Explosion-proof steel plate

 

After talking about the air bar, we have to mention the explosion-proof steel plate. According to the national standard, a qualified office swivel chair needs to add an explosion-proof steel plate with a thickness of not less than 2mm at the connection between the chair surface and the air bar. In case of explosion, it can prevent the air bar from breaking through the chair surface, which can play a very good isolation role, thus minimizing the harm to human body.

 

• Base five-star foot

 

The base of office swivel chair is generally of five-star foot structure. If it is not five-star foot, it will be unstable, so special attention should be paid when purchasing. As an important part of office chair, the base bears the weight of the whole human body, and the inferior base has the risk of fracture, which makes people fall and hurt easily. There is also the quality problem of casters in contact with five-star feet. If the material is not good, long-term regional activities will wear and fall off.

 

• Fabrics for liftable office chair

 

The chair surface and the chair back are the main contact parts with the human body, It is often composed of fabrics and fillers of different materials, Office chairs and ergonomic chairs are mainly breathable elastic mesh fabrics, And the boss chair is mainly leather or PU, Unqualified lining fabric is flammable, The risk of releasing harmful gases such as formaldehyde is easy to cause respiratory problems for people who are sensitive to gases in the home environment after long-term contact. Moreover, the environment as an office home is inherently small in area. In a cramped space, if other furniture emitting harmful gases is superimposed, it will even cause cancer risk.

 

Summary

 

AQSIQ for the above four test dimensions of qualified office chairs, note that this is the standard for purchasing qualified office chairs, so where are some measurement standards for an excellent office chair?

 

Additional tips

 

In daily life and work, we should not only have a comfortable ergonomic chair, but also develop good sitting habits. Ensure that the sitting posture is correct, the body is slightly tilted back, and the neck has a head support, so as to ensure that the neck releases part of its own pressure on the head support, which can reduce neck fatigue. The arm droops naturally, relaxes the shoulder muscles, and has a support at the elbow of the arm to reduce fatigue caused by exerting force to maintain its own position.

 

OSHA (Occupational Safety and Health Administration) recommends that the seat and backrest be adjusted slightly. Stretch your fingers, wrists, arms and body. The thigh and upper body, that is, the hip joint, are maintained or slightly greater than 90 degrees; The thigh and calf, that is, the knee joint, are maintained or slightly greater than 90 degrees; Maintain or slightly greater than ninety degrees between the upper arm and the lower arm, that is, the elbow joint. Finally, stand up regularly and walk for a few minutes, standing and sitting alternately to work and study.

 

We are professional OEM Liftable office chair, and if you have any need please feel free to contact us.