Bivalent Pressure Snap Fastener for Quick Temporary Closure

Solution Overview

Problem

Existing pressure snap fasteners require significant effort and complex manual operations for both temporary and stable closures, making them cumbersome for quick use, especially on articles with difficult shapes or limited space.

Innovation Solution

A pressure snap fastener with bivalent closure features, incorporating temporary engagement means for easy, weak joining and stable engagement means for tight coupling, allowing for quick and simple temporary closure with minimal effort, and a compact structure suitable for various materials and shapes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If conventional pressure snap fasteners are used for closure, then stable and strong coupling is achieved, but significant effort and complex manual operations are required

Engineering Contradiction:

Improveclosure strengthVSAvoidoperation simplicity

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The closure mechanism is divided into two distinct stages: temporary engagement means for initial closure and stable engagement means for final secure coupling. This segmentation allows the fastener to provide both easy temporary closure and strong stable closure through separate mechanisms, resolving the contradiction between operation simplicity and closure strength.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The fastener transitions dynamically from a temporary closure state to a stable closure state based on applied force. The temporary engagement means allows initial coupling with minimal effort, while the stable engagement means activates with stronger force to provide secure coupling. This dynamic behavior enables the system to adapt to different operational requirements.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If conventional pressure snap fasteners are used for temporary closure, then flaps can be joined, but significant effort and complex operations are still required

Engineering Contradiction:

Improvetemporary closure easeVSAvoidclosure effort

Core Design Contradiction:

Ease of operationVSForce

Solution Approach 1:

The closure mechanism is divided into two distinct stages: temporary engagement means for initial closure and stable engagement means for final secure coupling. This segmentation allows the fastener to provide both easy temporary closure and strong stable closure through separate mechanisms, resolving the contradiction between operation simplicity and closure strength.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The temporary engagement means provides partial closure functionality that is sufficient for temporary holding without requiring full stable engagement. This partial action allows flaps to be joined with minimal effort for temporary purposes, while the stable engagement means can be activated later if stronger coupling is needed.

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If conventional pressure snap fasteners are used, then reliable closure is achieved, but manual operations become cumbersome and time-consuming

Engineering Contradiction:

Improveclosure reliabilityVSAvoidclosure time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The closure mechanism is divided into two distinct stages: temporary engagement means for initial closure and stable engagement means for final secure coupling. This segmentation allows the fastener to provide both easy temporary closure and strong stable closure through separate mechanisms, resolving the contradiction between operation simplicity and closure strength.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The temporary engagement means provides preliminary closure action that can be achieved quickly with minimal effort. This preliminary action reduces the time required for initial closure operations, while the stable engagement means can be activated later if stronger coupling is needed, thus reducing overall closure time while maintaining reliability.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP2737816B1Pressure snap fastener with a bivalent closure

Publication Date: 2015.08.05 FIMMA

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AI summary

A pressure snap fastener with a bivalent closure comprises a first portion, to be associated with a first flap, and a second portion, to be associated to a second flap; said portions, as associated with one another joining the flaps. The pressure snap fastener further comprises first temporary engagement means providing a temporary closure, in which the two portions are joined by a weakly joining and are free of partially swinging, and second stable engagement means, providing a stable closure, in which the two portions are tightly coupled.