Wire Holder With Narrowing Slit To Prevent Band Slippage
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Solution Overview
Problem
Existing wire holders fail to securely fasten wires due to slippage of the binding band on the wire fixing portion, leading to wire displacement under vibration, which causes contact failures and abrasion between terminals.
Innovation Solution
A wire holder design with a wire fixing portion that has a smallest tightening diameter at its longitudinal intermediate part, featuring a slit with narrowing lateral edges and optionally concave surfaces, ensuring the fixing band remains secured at the intermediate part, preventing displacement and enhancing firm fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a binding band is wound around wires and tightened to fix them firmly, then the wires are securely held, but the binding band slips on the wire fixing portion under vibration causing wire displacement
Solution Approach 1:
The wire fixing portion is designed with non-uniform cross-sectional dimensions, creating a localized narrowest portion that provides enhanced friction and mechanical interlocking for the binding band. This local geometric variation ensures the binding band remains positioned at the narrowest portion without slipping, while other portions of the wire fixing portion maintain their original dimensions for wire accommodation.
Solution Approach 2:
The binding band is preliminarily positioned and tightened at the narrowest portion of the wire fixing portion during assembly, where the reduced cross-sectional dimensions create immediate mechanical retention. This preliminary positioning at the geometrically optimized location prevents subsequent displacement under vibration, as the binding band cannot slide past the narrowest portion.
2Ease of manufacture
If the wire fixing portion has a uniform cross-section, then manufacturing is simple, but the binding band can displace along the wire fixing portion
Solution Approach 1:
Instead of making the entire wire fixing portion complex, only a localized narrowest portion is created with reduced cross-sectional dimensions. This can be achieved through simple machining operations like turning or milling a reduced-diameter section, or through plastic deformation, keeping the overall manufacturing process relatively simple while providing the necessary position control for the binding band.
3Reliability
If the binding band is tightened firmly to prevent wire movement, then wire displacement is reduced, but the binding band bites into the insulation coating of the wires
Solution Approach 1:
The narrowest portion of the wire fixing portion acts as an intermediary mechanical feature that provides friction and physical retention for the binding band without requiring excessive tightening force. The geometric constraint of the narrowest portion creates mechanical interlocking that stabilizes the binding band position and prevents wire displacement while maintaining gentler contact pressure on the wire insulation coating.
Data Source
AI summary
A wire fixing portion (17) is so formed with a slit (24) as to minimize a tightening diameter at the wire fixing portion (17) by narrowing the slit (24). Thus, there is no likelihood of displacing a fixing band (25) fastened to a middle part of the wire fixing portion (17) toward a side where the tightening diameter is larger. Accordingly, displacements of the fixing band (25) relative to the wire fixing portion (17) are restricted, wherefore displacements of the wires (W) relative to the wire fixing portion (17) are suppressed.