Teaching professionals regularly use the chalk board eraser or duster throughout their life which leads to several unnoticed musculoskeletal disorders. The purpose of this study was to provide an alternate design for the existing Indian model chalk board eraser, because current eraser design causes noticeable amount of biomechanical load on the wrist, hand and shoulder region when its frequency of usage was high and repetitive. Initially, pilot study was conducted through an online modified Nordic questionnaire among 60 college professors to identify the risky regions of the body due to the use of existing chalk board eraser. This was followed by an experimental trial using surface Electromyography Sensors (sEMG) in which the muscle behaviour was evaluated during the chalkboard erasing process employing three newly designed dusters and a traditional duster. The results revealed that Model A designed with a large palm rest to align the palm and the forearm had better usability and the musculoskeletal distress was reduced when compared with the traditional duster. Whereas Model C designed with slip guards to improve the gripping forces was found to have better performance rating after Model A. Model B provided with separate handle was found to be the worst performer when compared with the conventional duster. Results suggested that providing an improved palm rest and slip guards such as grooves reduces the musculoskeletal distress.

教学专业人员在他们的一生中经常使用粉笔板橡皮擦或掸子，这会导致一些未被注意的肌肉骨骼疾病。本研究的目的是为现有的印度模型粉笔板橡皮擦提供替代设计，因为当前的橡皮擦设计在其使用频率高且重复时会导致手腕、手和肩部区域显着的生物力学负荷。最初，试点研究是通过对 60 位大学教授进行的在线修改北欧问卷调查进行的，以识别由于使用现有粉笔板橡皮擦而导致的身体危险区域。随后是使用表面肌电图传感器 (sEMG) 的实验性试验，其中在黑板擦除过程中使用三个新设计的除尘器和一个传统除尘器评估肌肉行为。结果显示，与传统掸子相比，Model A 设计了一个大掌托，使手掌和前臂对齐，具有更好的可用性，并且减少了肌肉骨骼的不适。而设计有防滑装置以提高抓握力的 C 型在 A 型之后具有更好的性能等级。与传统除尘器相比，发现带有单独手柄的 B 型性能最差。结果表明，提供改进的掌托和防滑装置（例如凹槽）可减少肌肉骨骼不适。结果显示，与传统掸子相比，Model A 设计了一个大掌托，使手掌和前臂对齐，具有更好的可用性，并且减少了肌肉骨骼的不适。而设计有防滑装置以提高抓握力的 C 型在 A 型之后具有更好的性能等级。与传统除尘器相比，发现带有单独手柄的 B 型性能最差。结果表明，提供改进的掌托和防滑装置（例如凹槽）可减少肌肉骨骼不适。结果显示，与传统掸子相比，Model A 设计了一个大掌托，使手掌和前臂对齐，具有更好的可用性，并且减少了肌肉骨骼的不适。而设计有防滑装置以提高抓握力的 C 型在 A 型之后具有更好的性能等级。与传统除尘器相比，发现带有单独手柄的 B 型性能最差。结果表明，提供改进的掌托和防滑装置（例如凹槽）可减少肌肉骨骼不适。而设计有防滑装置以提高抓握力的 C 型在 A 型之后具有更好的性能等级。与传统除尘器相比，发现带有单独手柄的 B 型性能最差。结果表明，提供改进的掌托和防滑装置（例如凹槽）可减少肌肉骨骼不适。而设计有防滑装置以提高抓握力的 C 型在 A 型之后具有更好的性能等级。与传统除尘器相比，发现带有单独手柄的 B 型性能最差。结果表明，提供改进的掌托和防滑装置（例如凹槽）可减少肌肉骨骼不适。