Hedge Trimmer Trigger Lever Inclined Forward Design
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Solution Overview
Problem
Prolonged operation of existing single-blade hedge trimmers with the trigger lever extended leads to severe fatigue, causing the finger to leave the trigger, resulting in the blade stopping unexpectedly.
Innovation Solution
A hedge trimmer design with a front handle featuring a rod-shaped gripping portion and a trigger lever that protrudes laterally and is inclined forward, allowing easy operation even with an extended arm, reducing the need for wrist twisting and minimizing operator fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the trigger lever is positioned directly below the front grip, then the structure is simple, but operator fatigue increases during prolonged use with extended arm
Solution Approach 1:
The trigger lever is repositioned from a vertical arrangement (directly below the front grip) to an inclined arrangement that extends forward. This spatial reconfiguration in multiple dimensions allows the trigger lever to be accessed more naturally when the arm is extended, reducing wrist twisting and operator fatigue while maintaining structural simplicity
2Volume of moving object
If the trigger lever is positioned directly below the front grip, then the design is compact, but finger control is lost during extended arm operation
Solution Approach 1:
By repositioning the trigger lever to an inclined position extending forward from the front grip, the design maintains compact dimensions while enabling reliable finger control during extended arm operation. The new positioning ensures the finger remains engaged with the trigger lever throughout the cutting motion, preventing unexpected blade stoppage
Data Source
AI summary
A hedge trimmer comprises a cutter assembly and a drive operating portion for driving and operating the cutter assembly is provided. The drive operating portion in the hedge trimmer includes a body with a power source, a front handle, and a rear handle. The front handle includes a rod-shaped front gripping portion provided to protrude laterally of the cutter assembly and a trigger lever displaceably mounted on the front gripping portion, allowing and releasing transmission of drive power from the power source to the cutter assembly. When the hedge trimmer is viewed laterally in a state where a thickness direction of the cutter assembly being a vertical direction, the trigger lever is arranged to protrude from the front gripping portion in a direction inclined forward with respect to the vertical direction on a lower side of the vertical direction.