Final answer:
When buying shears, handle design for comfort, a three-blade design for efficiency and safety, and even weight distribution for balance are three ergonomic considerations that one should keep in mind.
Step-by-step explanation:
When buying shears, it is important to consider several ergonomic factors to ensure safety, comfort, and efficiency during use. Here are three considerations:
- Handle Design: The shears should have a handle that is comfortable to hold for extended periods, with a shape that conforms to the natural grip of the hand. This allows for better control and reduces strain on the hand and wrist.
- Blade Design: A three-blade design is not only more efficient but also safer due to its lower tip speed as mentioned in Figure 12.4. This design may help minimize the risk of accidents and increase cutting precision.
- Weight and Balance: The weight of the shears should be evenly distributed to prevent muscle fatigue. A well-balanced shear reduces the effort required during cutting, leading to a more comfortable use over longer periods.