Button With Interference Fit Radial Clamping
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Solution Overview
Problem
Existing interlocking buttons for clothing lack a stable and irreversible coupling mechanism, leading to potential separation and reuse issues.
Innovation Solution
A decorative button design featuring a bottom element with a stem, a closing element with a pin, and a fixing element with a trunk, where the stem is coupled with an interference fit to both the pin and the trunk, creating a radial clamping action for irreversible binding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple superposition and pressure binding mode is used to assemble button components, then the ease of manufacture is improved, but the stability and reliability of the coupling deteriorates
Solution Approach 1:
The pin is inserted into the stem, and the trunk encloses the stem, creating a nested structure where components are inserted into one another. This nesting provides mechanical interlocking that prevents separation while maintaining a relatively simple assembly process through sequential insertion
Solution Approach 2:
The interference fit mechanism operates in the radial dimension, creating clamping forces perpendicular to the axial insertion direction. This dimensional transition from axial assembly to radial clamping provides strong coupling stability without complicating the assembly process
2Reliability
If an interference fit with radial clamping action is implemented, then the stability and reliability of the coupling is improved, but the device complexity increases
Solution Approach 1:
The interference fit is applied locally at specific interfaces (pin-stem and stem-trunk) rather than throughout the entire structure. This localized application of complex mechanical coupling provides high reliability at critical joints while keeping the overall structure simple and easy to manufacture
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The button achieves a stable and irreversible mechanical interlocking coupling of its constituent elements, ensuring secure attachment to clothing without the risk of separation.
Implementation Method 1
the stem is configured to be coupled with interference fit internally with the pin and externally with the trunk so that the trunk causes a radial clamping action on the stem and, through the stem, on the pin
Data Source
AI summary
A button including a bottom element which has a stem extending along an axial direction, a closing element which has a pin extending along the axial direction internally to the stem, the pin being configured to bind to the stem, a fixing element having a trunk extending along the axial direction externally to the stem, the trunk being configured to receive and bind to the stem. The stem is configured to be coupled with interference fit internally with the pin and externally with the trunk so that the trunk causes a radial clamping action on the stem and, through the stem, on the pin.