T/NBWJ 06-2023 Electric Eraser

Scope

Main Technical Content: The main technical content is determined as follows: a) **Erase Rate**: "The erase rate should not be less than 80%". According to QB/T 2309-2020, "the erase rate of rubber erasers should be ≥75%, and that of plastic erasers should be ≥80%". The erase rate of electric erasers is set based on industry standards. b) **Noise**: "The sound power level noise should not exceed 58 dB(A)". Electric erasers are typically used in relatively quiet environments. Excessive noise can be annoying and may affect the work and study of others nearby. Therefore, during use, the noise level should be minimized. This indicator references the noise standard of QB/T 4846-2015 for electric pencil sharpeners: 73 dB. Based on test data from four brands, the current noise level ranges from 48 to 56 dB, so this value is temporarily set. c) **Blocking**: "After 30 seconds of blocking, the motor should be able to start normally, and the erase rate should meet the requirements of 5.2.1". Considering that electric erasers may experience abnormal situations where the eraser head does not rotate during use, as they are typically manually operated and can be powered off quickly, this does not lead to motor overheating and damage, causing safety issues. However, after powering off and addressing the abnormal situation, the motor should still function normally and meet the erase rate requirements. Based on different user age groups, the power-off time is typically less than 10 seconds. To account for cases where the power is not immediately turned off, the blocking test is set to last 30 seconds. d) **Durability**: "The switch life should be no less than 8,000 times, and the motor running life should be no less than 1,800 minutes". Typically, the single use time of an eraser is short. Assuming an average use time of 15 seconds per use and 10 uses per day, and considering extreme scenarios where the product is used for two years, the motor running life should meet the r

Development Information

Related Standards