Asymmetric Coil Support for Trimmer Line Fixation
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Solution Overview
Problem
Existing coil supports for trimmer lines are cumbersome to wind and unwind, often leading to entanglement and difficulty in removing sections without accidental unwinding.
Innovation Solution
A coil support with a central coil core and securing elements, including a support plate and radial flanges, that allows for easy winding and secure fixation of the trimmer line, preventing accidental unwinding and accommodating different line diameters through adjustable clamping openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the coil support uses a simple structure without securing elements, then the device complexity is reduced, but the coil will accidentally unwind and the trimmer line becomes entangled
Solution Approach 1:
The coil support is divided into functional segments: the coil core for winding, the support plate for structural stability, and radial flanges with clamping openings for securing the line ends. This segmentation allows each part to perform its specific function while maintaining overall simplicity
Solution Approach 2:
The securing elements (clamping openings in radial flanges) are pre-positioned on the coil support before the coil is wound. This preliminary arrangement of securing elements allows for quick and easy fixation of the line ends without requiring additional tools or complex operations
2Reliability
If the coil support includes securing elements like radial flanges and clamping openings, then the coil positional fixation is improved, but the device complexity increases
Solution Approach 1:
Multiple securing functions are merged into a single integrated structure. The radial flanges serve both as structural supports and as carriers for the clamping openings, while the support plate combines structural support with the mounting surface for the entire assembly. This merging reduces the number of separate components
Solution Approach 2:
The radial flanges serve multiple functions: they provide structural support for the coil, create radial extensions that prevent coil unwinding, and incorporate clamping openings for securing line ends. The support plate provides both structural stability and a mounting surface, serving multiple purposes with a single component
3Ease of operation
If the support plate is larger in one radial direction than the other, then the ease of operation for winding is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The support plate is deliberately designed with asymmetric dimensions, being larger in one radial direction than the other. This asymmetry creates an optimized winding surface that facilitates easier manual winding operations, allowing the user to comfortably hold and rotate the coil support during the winding process
Data Source
AI summary
A coil support with a coil of a trimmer line has a coil core with an outer wall surface and first and second axial ends. At the axial ends securing elements that project past the wall surface of the coil core are provided for positional fixation of the coil wound onto the coil core. A securing element provided at the first axial end is a support plate with a longitudinal center axis. The size of the support plate is provided in the direction of the longitudinal center axis with a greater extension than transverse to the longitudinal center axis such that the support plate in a first radial direction of the coil core is greater than in a second radial direction. The coil core is fixedly connected with the support plate and with the further securing elements that are provided on the second axial end.