Dual-Clip Fastener Structure for Removable Play Compensation

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Solution Overview

Problem

Existing fixing devices lack play compensation, require a lower support, and are not designed for removable attachment, with issues of tangling and inadequate tension and tearing forces.

Innovation Solution

A fixing device comprising a tension clip and a tear-off clip, with angular and tilting capabilities, allowing for removable attachment and play compensation, featuring a V-shaped tension sections and folding portions to ensure balanced tension and tearing forces, and prevent tangling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional clip is used to fix elements, then the elements are held firmly, but the clip cannot be removed and lacks play compensation

Engineering Contradiction:

Improvefirm holdingVSAvoidremovable attachment

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The fixing device is divided into two separate clips: a tension clip that provides firm holding and a tear-off clip that enables removal. This segmentation allows each component to specialize in one function, resolving the contradiction between reliable attachment and removable capability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The tear-off clip is designed to be discarded after use, while the tension clip remains in place. This allows the assembly to transition from a permanent fixing state to a removable state, enabling both firm holding during use and easy removal when needed

Inventive Principle:

Principle #34Discarding and recovering

2Device complexity

If a conventional clip is used, then the structure is simple, but there is no play compensation mechanism

Engineering Contradiction:

Improvestructure simplicityVSAvoidplay compensation

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The connecting section is designed with angular movement and tilting capabilities, transforming a static rigid structure into a dynamic system that can adapt to misalignments and compensate for play between components while maintaining overall structural simplicity

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The connecting section allows changes in angular parameters (rotation and tilting angles) to accommodate variations in assembly geometry, providing play compensation without requiring complex mechanical mechanisms

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the connecting section allows angular movement and tilting, then play compensation is improved, but the device complexity increases

Engineering Contradiction:

Improveplay compensationVSAvoidangular movement mechanism

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The connecting section utilizes flexible geometric design with curved surfaces and thin-walled structures that naturally accommodate angular movements and tilting through elastic deformation, providing play compensation without complex mechanical joints or actuators

Inventive Principle:

Principle #30Flexible shells and thin films

4Force

If the tension sections extend outwardly and form bending portions, then balanced tension forces are achieved, but manufacturing precision requirements increase

Engineering Contradiction:

Improvebalanced tensionVSAvoidsymmetrical geometry

Core Design Contradiction:

ForceVSManufacturing precision

Solution Approach 1:

While the overall design aims for symmetry, the tension sections incorporate controlled asymmetric bending portions that naturally distribute forces evenly through geometric design, reducing the need for extremely tight manufacturing tolerances while achieving balanced tension forces

Inventive Principle:

Principle #4Asymmetry

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 device provides robust and removable attachment with balanced tension and tearing forces, preventing tangling and compensating for play, enhancing structural integrity and assembly geometry.

Implementation Method 1

the connecting section allows angular movement and/or tilting of the tension clip when the fixing device is mounted on a structure having an opening, thereby reinforcing the robustness of the device

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentEP4375518B1Fixing device

Publication Date: 2025.09.10 A RAYMOND & CO SCS

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AI summary

The invention relates to a fastening device (10) for attaching a first structure (600) having a hole to a second structure (800) also having a hole, comprising a first clip (100), referred to as a tension clip, and a second clip (200), referred to as a release clip, arranged respectively on two essentially parallel planes. The tension clip (100) comprises two opposing tension sections (110, 160) and two wings (130, 180). Each tension section (110, 160) extends in a first direction (D) from a longitudinal axis (XX') of the fastening device (10) from a central portion (50). Each tension section (110, 160) extends outward from the longitudinal axis (XX') and then back towards the longitudinal axis (XX'), forming a folded portion. The pull-out clip (200) has two opposing arms (210, 260) extending in the first direction (D) from the central portion (50).