Hedge Trimmer Circuit Unit Under Handle
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Solution Overview
Problem
The operability of hedge trimmers varies significantly with size and weight balance, making it difficult for users to efficiently and stably operate them.
Innovation Solution
The hedge trimmer design includes a housing configuration with the electric circuit unit located under the handle, providing stability and allowing for a more compact size, along with a brushless motor and cooling fan, which enhances user control and visibility of the shear blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the hedge trimmer is designed with a compact size, then the device complexity is reduced, but the weight balance and stability deteriorate
Solution Approach 1:
The electric circuit unit is repositioned from a conventional horizontal arrangement to a vertical arrangement underneath the handle, utilizing the vertical dimension for weight optimization. This dimensional change allows the heavy component to be positioned lower, improving stability without increasing the horizontal footprint of the device.
Solution Approach 2:
The electric circuit unit serves as a counterweight by positioning the heavy component underneath the handle, creating a balanced weight distribution. This counterweight effect stabilizes the hedge trimmer during operation, preventing it from tipping forward or backward while maintaining a compact overall size.
2Ease of operation
If the electric circuit unit is positioned to improve stability, then the operability is improved, but the device complexity increases
Solution Approach 1:
The electric circuit unit is integrated into the handle structure itself, merging the housing and circuit unit into a single unified component. This integration eliminates the need for separate mounting brackets or additional structural elements, reducing device complexity while maintaining the stability-improving position underneath the handle.
Solution Approach 2:
By utilizing the vertical space underneath the handle, the design avoids horizontal expansion that would increase device complexity. The vertical positioning provides stability benefits without requiring additional horizontal structural support or increasing the overall device footprint.
3Stability of the object's composition
If the hedge trimmer is made heavier for stability, then the stability improves, but the ease of operation deteriorates
Solution Approach 1:
The heavy electric circuit unit is strategically positioned underneath the handle to create a counterbalancing effect. This counterweight positioning lowers the center of gravity, improving stability during cutting operations, while the compact vertical arrangement minimizes the overall weight increase compared to horizontal distribution.
Solution Approach 2:
By transitioning from horizontal to vertical arrangement of the electric circuit unit, the design concentrates weight in a compact vertical space rather than spreading it horizontally. This dimensional change achieves stability through lower center of gravity while minimizing the total weight increase and maintaining ease of operation.
Data Source
AI summary
A hedge trimmer may include a housing provided with a handle configured to be gripped by a user, a pair of shear blades extending forward from the housing; a motor housed in the housing and configured to drive at least one of the pair of shear blades; and an electric circuit unit housed in the housing and configured to control power supplied to the motor. The handle may be provided at an upper portion of the housing in rear of the motor, and the electric circuit unit may be located under the handle in the rear of the motor.