Press Stud Cover Cap Nesting for Graphic Customization

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Solution Overview

Problem

Conventional press studs with custom cover caps face issues of increased thickness, potential deformation, and aesthetic flaws due to manufacturing pressures, making it difficult to produce slender, high-quality studs with clear graphic customization.

Innovation Solution

A press stud design featuring a female component with a base structure, a resiliently deformable member, and a cover cap fixed by bending the cap's edge around the base, creating a substantially flat surface for customization without compromising assembly, robustness, or closure security.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a cover cap is applied to the female component for customization, then graphic customization quality is improved, but the thickness of the female component increases

Engineering Contradiction:
Improvegraphic customization qualityVSAvoidthickness of female component
Core Design Contradiction:
Manufacturing precisionVSLength of stationary object

Solution Approach 1:

The cover cap is nested within the housing structure of the female component, with the cap positioned inside the housing rather than adding external thickness. The housing walls contain the cap, allowing the overall thickness to be determined by the housing dimensions rather than cap-plus-housing.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The solution moves the customization surface from an external additive element to an internal surface within the housing. By placing the cover cap inside the housing and using its outer surface for customization, the design utilizes the internal dimensional space rather than adding external thickness.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Reliability

If manufacturing pressure is applied to bend the cover cap edge around the base structure, then assembly is secured, but the cover cap surface becomes deformed and aesthetic quality deteriorates

Engineering Contradiction:
Improveassembly securityVSAvoidsurface flatness and graphic quality
Core Design Contradiction:
ReliabilityVSManufacturing precision

Solution Approach 1:

The bending action is localized to the peripheral edge of the cover cap, while the central surface area that requires flatness for graphic customization is protected from deformation. The housing structure provides a defined space that accommodates the bent edge without transmitting deformation forces to the customization surface.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The housing structure is designed with sufficient wall thickness and structural rigidity to resist the bending forces applied to the cap edge during assembly. This preliminary structural design prevents the deformation forces from reaching the cap's customization surface, maintaining its flatness despite the assembly process.

Inventive Principle:
Principle #9Preliminary anti-action

3Adaptability or versatility

If the female component structure is designed to accommodate a cover cap, then customization is enabled, but the overall device complexity increases

Engineering Contradiction:
Improvecustomization capabilityVSAvoidfemale component structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The housing structure serves multiple functions: it provides structural support for the resilient member, contains the cover cap, and defines the overall geometry of the female component. By combining these functions into a single integrated housing, the design adds customization capability without proportionally increasing complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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

This design allows for the production of slender, high-quality press studs with easy assembly and low costs, maintaining aesthetic appeal and preventing deformation of graphic elements, while ensuring secure closure.

Implementation Method 1

a resilient member generally composed of a resiliently deformable ring... the ring is resiliently deformed when the head of the male component is introduced into the ring

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

cover cap means being fixed to the base structure so as to cover it at least partially and close off, at least partially, the housing seat

Methodology Applied
Scientific EffectPlastic deformation: Plasticity

Data Source

PatentEP2247213B1An improved press stud
Publication Date: 2011.12.07 RIRI IND
  • EP2247213B1 patent drawingFigure 1~2
  • EP2247213B1 patent drawingFigure 3~4
  • EP2247213B1 patent drawingFigure 5

AI summary

A press stud (10) comprises a male component (12) which can engage selectively by a snapping action in a female component (14) which comprises a resilient ring (15) which, in a closed condition of the press stud, keeps the male component (12) in connection with the female component (14). The female component (14) comprises a base structure (24) with a housing seat (30) for the resilient ring (15). A cover cap (34) is fixed to the base structure (24) so as to cover it at least partially and close off, at least partially, the housing seat (30) for the resilient ring (15).