Office Chair Shock Absorption Test
The shock absorption test for office chairs mainly includes tests such as the rotational endurance test of the shock-absorbing office chair base, vertical drop test, seat surface impact test, and base vibration test. Through these tests, the shock absorption performance and structural stability of office chairs can be comprehensively evaluated.
The rotational endurance test of the shock-absorbing office chair base is a crucial method for evaluating the base's fatigue resistance during long-term use. The testing machine simulates the rotational movements under a seated posture through a mechanical transmission system and applies a standardized load (such as simulating human body weight) to accelerate the testing process. Its core principles include load simulation, rotational motion simulation, and data acquisition, assessing the base's fatigue life through cyclic testing. The testing machine is typically composed of a frame structure, drive system, load system, fixture device, control system, and data recording unit, forming an automated testing platform. For example, a certain model of the testing machine can set parameters such as rotation angle, speed, and load, and after running tens of thousands of times continuously, it analyzes the wear or deformation of the base through the data recording unit to determine whether it meets the durability standards.
The vertical drop test for office chairs mainly evaluates the safety of the overall structure in the event of an accidental drop. During the test, the seat is adjusted to its maximum usable height, and a specified load (such as simulating human body weight) is applied to the seat surface. The seat is then freely dropped from the highest point along a vertical guide shaft to a concrete floor using a dedicated release device. The same chair needs to undergo a drop test once in each of four different directions (such as front, back, left, and right), with a focus on checking whether core load-bearing components such as the gas spring, chassis, and five-star base show cracks, deformation, or functional failure. For example, a certain standard requires that there be no leakage from the gas spring and no breakage of the five-star base after the drop to ensure that an accidental drop during actual use will not cause the seat to disintegrate or injure people.
The seat surface impact test for office chairs evaluates the seat surface's resistance to breakage by simulating the repeated pressure during long-term use. The test uses a dedicated testing machine that repeatedly impacts the seat surface with a 57-kilogram sandbag from a height of 30 millimeters. After 100,000 consecutive impacts, it observes whether the seat surface shows breakage or collapse. This test can verify the impact resistance of the seat surface material and the rationality of the structural design. For example, a certain model of the seat requires that the depression depth of the seat surface be less than 2 millimeters after the test to ensure long-term use comfort.
The base vibration test for office swivel chairs evaluates the base's durability and safety under dynamic loads in accordance with the GB/T 2423.10 standard. During the test, the vibration frequency ranges from 10Hz to 150Hz, with the vibration amplitude and acceleration adjustable in multiple gears, and the test duration lasting several hours. By simulating vibration environments at different frequencies, it checks whether the base connectors are loose, whether the structure is cracked, or whether the function is lost. For example, a certain standard requires that the base can still rotate normally and make no abnormal noise after the test to ensure stability in vibration environments (such as on uneven ground or during movement).
