Retaining Clamp Structure for Stable Cylindrical Post Fastening

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Solution Overview

Problem

Existing fasteners for connecting vehicle components, such as interior panels to body sheet metal, often require complex mounting and securing processes, and may not provide sufficient stability and anti-release mechanisms.

Innovation Solution

A fastening clamp with resilient retaining legs and an anti-release structure, designed to securely connect to a cylindrical post, featuring staggered and helically arranged legs for enhanced stability and a convex portion to prevent disengagement, integrated with a connection seat for additional support.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional fasteners are used to connect vehicle components, then connection stability is achieved, but the mounting process becomes complex and time-consuming

Engineering Contradiction:
Improveconnection stabilityVSAvoidmounting process complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The fastening clamp is divided into distinct functional segments: a substrate providing structural support, multiple resilient retaining legs for engagement, and an anti-release structure for security. This segmentation allows each component to perform its specific function independently, simplifying the overall mounting process while maintaining connection stability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The resilient retaining legs automatically deflect and engage with the connecting post through elastic deformation, creating a self-securing mechanism that does not require additional fastening steps or complex mounting procedures. The anti-release structure further enhances this by preventing accidental disengagement without requiring active intervention.

Inventive Principle:
Principle #25Self-service

2Strength

If traditional fasteners are used to connect vehicle components, then connection strength is achieved, but the assembly process requires welding or complex securing mechanisms

Engineering Contradiction:
Improveconnection strengthVSAvoidassembly ease
Core Design Contradiction:
StrengthVSEase of operation

Solution Approach 1:

The resilient retaining legs utilize elastic deformation as a key parameter, allowing them to deflect during insertion and then spring back to securely engage the connecting post. This elastic parameter change enables strong mechanical engagement without requiring welding or complex securing mechanisms, significantly easing the assembly process.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The retaining legs transition from a static to a dynamic state during assembly, deflecting elastically as they engage with the connecting post. This dynamic behavior allows the fastening clamp to achieve strong connection through controlled deformation and recovery, eliminating the need for permanent joining methods like welding.

Inventive Principle:
Principle #15Dynamics

3Ease of operation

If resilient retaining legs are used to simplify mounting, then ease of assembly is improved, but the risk of accidental disengagement increases

Engineering Contradiction:
Improveassembly easeVSAvoidanti-release capability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The anti-release structure is designed to preemptively counteract any forces that might cause accidental disengagement. By positioning this structure to engage with corresponding features on the connecting post or first component, it creates a preliminary protective mechanism that prevents release before it can occur, maintaining reliability while preserving assembly ease.

Inventive Principle:
Principle #9Preliminary anti-action

4Reliability

If multiple retaining legs are used to enhance stability, then connection reliability is improved, but the device complexity increases

Engineering Contradiction:
Improveconnection stabilityVSAvoidfastener structure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

Multiple retaining legs are merged into a single integrated fastening clamp structure, where all legs are formed as one piece from the substrate. This combining approach provides the stability benefits of multiple engagement points while avoiding the complexity of assembling multiple separate components, as the entire structure with all retaining legs is installed as a single unit.

Inventive Principle:
Principle #5Merging (Combining)

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

Provides stable and secure connections without the need for welding, allowing for easy assembly and preventing accidental disengagement, while maintaining structural integrity.

Implementation Method 1

the at least two first retaining legs are resilient and configured to deflect about the proximal ends of the at least two first retaining legs

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP4253773B1Fastening clamp
Publication Date: 2025.06.25 ILLINOIS TOOL WORKS INC
  • EP4253773B1 patent drawingFigure 1A
  • EP4253773B1 patent drawingFigure 1B
  • EP4253773B1 patent drawingFigure 1C~1D

AI summary

The present application provides a fastening clamp, used for connecting a first component to a second component having a connecting post, including: a substrate (101) on which a mounting hole (108) is provided; at least two first retaining legs (103,104,105), and at least two second retaining legs (113,114,115), where the mounting hole (108) is used to receive the connecting post of the second component, proximal ends of the at least two first retaining legs (103,104,105) are connected to an edge of the mounting hole (108), proximal ends of the at least two second retaining legs (113,114,115) are connected to the edge of the mounting hole (108), and the at least two first retaining legs (103,104,105) and the at least two second retaining legs (113,114,115) are on the same side of the substrate (101); where distal ends of the at least two second retaining legs (113,114,115) are closer to the substrate (101) than distal ends of the two first retaining legs (103,104,105), and the at least two first retaining legs (103,104,105) and the at least two second retaining legs (113,114,115) are configured to be able to collectively retain the connecting post of the second component in the mounting hole (108). The fastening clamp in the present application can be mounted on a cylindrical connecting post.