What is a grass cutting sword?
What is a grass cutting sword?
Grass cutting sword is a low-cost hand tool to cut grass and bushes. This is used when a person wants to trim the grass from a distance.
Problem Statement
Problem Statement
To redesign the grass cutting sword in an ergonomic way in which metacarpal and
carpal related injuries are reduced or eliminated.
Pain area in hand while holding or operating the grass cutting sword.
Key Findings
Key Findings
To further understand the problem, we conducted field research and did body pain mapping tests, Nordic questionnaires, task analysis, and postural analysis. The key findings are as follows:
- The gardeners can’t use it for more than 15-20 mins in one go.
- Prolonged use causes swelling in the wrist which indicates carpal related issues.
- Shoulder, elbows, and forearms are also affected.
- Wrist works as a pivot point which is subjected to most stresses.
- The sword can come loose from the hand of the user as it has no grip
After generating various concepts, we finalized one with the help of Pugh’s concept selection method.
Concept
Ergonomic Grass Cutting Sword Concept
Concept
Final Design with Indian Anthropometric Dimensions
Low Fidelity Prototype