Demountable Switching Assembly for Electric Garden Tools
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Solution Overview
Problem
Existing garden apparatus switching assemblies require multiple designs to accommodate different market cable connectivity requirements and fail to ensure safe two-handed operation, particularly for battery-powered and mains-powered variants.
Innovation Solution
A demountable switching assembly combining a mechanical module with user-operable movable members and an electrical switching module, where both hands are required to activate the motor, featuring a pivotally mounted lever and central press button to ensure safe operation and adaptable design for various market needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple switch-case designs are developed to cover different market cable connectivity requirements, then adaptability to different markets is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent creates a universal switch-case assembly where the electrical switching module can be demountably coupled to different mechanical modules. The electrical module serves multiple functions across different markets (mains-powered and battery-powered variants) while the mechanical modules are specialized for specific cable connectivity requirements. This allows one electrical module design to serve multiple market segments without requiring multiple complete switch-case designs.
Solution Approach 2:
The switch-case assembly is divided into separate demountable modules: an electrical switching module and mechanical modules. This segmentation allows the electrical module to be standardized across different markets while the mechanical modules can be customized for specific cable connectivity requirements. The modules can be independently manufactured and then assembled, reducing overall complexity.
2Reliability
If a two-handed operation mechanism is implemented using multiple user-operable movable members, then user safety is improved, but ease of operation decreases
Solution Approach 1:
The patent combines multiple user-operable movable members (first and second movable members) into a single integrated mechanical module that houses them together. While the module requires two-handed operation for safety, the compact integration allows both controls to be operated simultaneously or in sequence without requiring excessive space or complex positioning. The mechanical module consolidates the safety mechanism into one accessible location.
3Reliability
If the electrical switching module is made self-contained with mechanical protection, then reliability of electrical components is improved, but device complexity increases
Solution Approach 1:
The electrical switching module is segregated into its own self-contained unit with its own outer casing that provides mechanical protection. This separate enclosure protects sensitive electrical components from environmental factors and physical damage. The protected electrical module can then be easily coupled to or decoupled from mechanical modules, simplifying assembly and maintenance while maintaining component reliability.
Data Source
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AI summary
The present invention relates to improvements in or relating to electrically-powered garden apparatus. We describe a switching assembly for a garden apparatus comprising a mechanical module and an electrical switching module wherein the mechanical and electrical switching modules are demountably couplable between a coupled and a decoupled configuration. The mechanical module comprises at least one user-operable movable member and an output switch actuator associated with the at least one user-operable movable member and movable thereby between a non-operating position and an operating position. The electrical switching module comprises an electrical input, an electrical output and electrical switch having a switch actuator element arranged, in use, to connect electrically the input and the output. The mechanical and electrical switching modules are arranged such that, in the coupled configuration, the output switch actuator, when in the operating configuration, actuates the switch actuator. The design of the electrical input to the electrical switch module can be selected to suit the standards of any particular market.