Button Attachment Tool Cap Rotation Prevention
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Solution Overview
Problem
Conventional button attachment tools experience cap rotation relative to the attachment tool body over time, leading to design uniformity issues and potential separation of components, causing buttons to detach from materials.
Innovation Solution
A button attachment tool with a metal attachment tool body and synthetic resin cap, featuring a flange part with inwardly recessed notches and a clamping part that sandwiches the flange part, reducing cap rotation through resin material filling the notches and using cold working for fastening, which reduces manufacturing costs and enhances stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cap is fastened to the attachment tool body using conventional methods, then the manufacturing cost is reduced and the structure is simple, but the cap rotates with respect to the attachment tool body over time, causing design uniformity to be impaired
Solution Approach 1:
The flange part is designed with notches that create an asymmetric geometry, preventing the cap from rotating relative to the attachment tool body. The notches engage with corresponding features on the cap in a non-symmetric manner, ensuring fixed orientation while maintaining structural simplicity.
Solution Approach 2:
The notches are pre-formed on the flange part before assembly, so that when the cap is fastened, the resin material automatically fills the notches and locks the cap in the correct orientation. This preliminary structuring prevents rotation without requiring complex fastening mechanisms.
2Reliability
If the cap is fastened to the attachment tool body using conventional methods, then the manufacturing process is simple, but the connection may weaken over time, causing the button to come off from the material
Solution Approach 1:
The connection structure utilizes composite materials where resin material fills the notches on the metal flange part, creating a metal-resin composite joint. This composite structure enhances connection strength and prevents loosening over time while maintaining ease of manufacture through cold working processes.
Solution Approach 2:
The notches are strategically positioned on the flange part to concentrate the fastening force at specific locations. This local quality enhancement ensures strong connection points that prevent button detachment while keeping the overall manufacturing process simple.
3Productivity
If cold working is used for fastening the cap to the attachment tool body, then manufacturing costs are reduced and production efficiency is improved, but the resin material must properly fill the notches to prevent rotation
Solution Approach 1:
The notches are pre-formed with precise geometry and dimensions before the fastening process. This preliminary action ensures that when cold working is applied, the resin material naturally fills the notches completely and uniformly, achieving both high productivity and manufacturing precision without requiring complex control systems.
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 solution effectively eliminates or reduces cap rotation, maintaining design uniformity and ensuring secure attachment of buttons to materials by sandwiching the flange part with the cap, preventing buckling and damage to the cap's surface.
Implementation Method 1
the clamping part of the cap is fastened to a radial outer portion of the flange part including the multiple notches... the resin material of the clamping part enters each notch so as to fill each notch
Data Source
AI summary
Provided is a button attachment tool that can eliminate or reduce rotation of a cap relative to an attachment tool body. A button attachment tool comprises a metal attachment tool body and a synthetic resin cap to which the attachment tool body is coupled. The attachment tool body includes a cylindrical part and a flange part extending radially outward from one axial end of the cylindrical part. The flange part includes a plurality of notches recessed radially inward from a peripheral edge of the flange part. The cap includes a clamping part that is fastened to a radially outer portion of the flange part including the plurality of notches.