PCB Plug Contact Spring Structure to Prevent Assembly Jamming

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Solution Overview

Problem

Conventional plug contacts for circuit board connections face challenges in ease of assembly and reliability, particularly in preventing jamming and maintaining resilience during packaging and assembly, which affects their functionality and usability.

Innovation Solution

A plug contact design featuring a fixing portion with a spring section that has a hollow shape between its ends, providing a circumferentially closed contour at one end and an open contour at the other, allowing for reversible and resilient fixation to a circuit board, preventing jamming and ensuring easy assembly and disassembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional plug contacts with splayed resilient legs are used, then the circuit board connection can be fixed to the circuit board, but the resilient legs may jam during packaging and assembly, reducing reliability

Engineering Contradiction:
Improvefunctionality of plug contactVSAvoidease of assembly
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The fixing section is divided into multiple resilient fingers (typically 3-5) that are separated by hollow sections. Each finger can independently deform and spring back, preventing jamming while maintaining fixing capability. This segmentation allows each finger to operate independently during insertion and packaging, eliminating the mutual interference that causes jamming in conventional splayed leg designs.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The resilient fingers are designed as flexible, thin-walled structures that can elastically deform during insertion and packaging. The hollow sections between fingers provide flexibility and allow the fingers to bend without breaking. This flexible design enables the plug contact to withstand packaging stresses and assembly forces without jamming, while still providing reliable fixing when inserted into the circuit board.

Inventive Principle:
Principle #30Flexible shells and thin films

2Strength

If the fixing section has a solid structure, then it provides structural strength, but it cannot provide resilient fixing functionality

Engineering Contradiction:
Improvestructural strength of fixing sectionVSAvoidresilience during fixation
Core Design Contradiction:
StrengthVSReliability

Solution Approach 1:

The resilient fingers are designed as thin-walled hollow structures that provide both strength and flexibility. The hollow sections between the fingers act as spring elements that can elastically deform, allowing the fixing section to maintain structural integrity while providing resilient fixing functionality. The thin-walled design enables the fingers to bend and spring back without breaking, ensuring reliable fixation.

Inventive Principle:
Principle #30Flexible shells and thin films

Solution Approach 2:

The fixing section combines rigid and flexible elements in a composite structure. The resilient fingers provide structural strength at their roots while having flexible, thin-walled sections that can deform. This composite design allows the fixing section to maintain overall structural integrity while enabling the individual fingers to exhibit resilient behavior during insertion and fixation.

Inventive Principle:
Principle #40Composite materials

3Productivity

If multiple plug contacts are packaged together, then mass production is enabled, but the resilient legs may jam with each other, reducing productivity

Engineering Contradiction:
Improvemass production capabilityVSAvoidfunctionality during packaging
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The segmentation of the fixing section into multiple independent resilient fingers separated by hollow sections prevents mutual interference during packaging. Each finger can move independently within its own space, and the hollow sections act as spacers that prevent adjacent plug contacts from jamming together. This design enables reliable mass production packaging without the jamming issues that plague conventional splayed leg designs.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The flexible, thin-walled resilient fingers can elastically deform to accommodate packaging stresses and close tolerances. This flexibility allows multiple plug contacts to be packaged tightly together without jamming, as the fingers can bend slightly to avoid mutual interference. The resilient nature of the thin-walled structure ensures that the plug contacts remain functional after packaging and assembly.

Inventive Principle:
Principle #30Flexible shells and thin films

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 design enhances the ease of assembly, maintains resilience, and prevents jamming, making the plug contacts suitable for mass production and reuse while ensuring a secure and reliable connection between the circuit board connection and the circuit board.

Implementation Method 1

the spring section has a first end at a distal end of the fixing section, and the fixing section has a circumferentially closed contour at the distal end, and the spring section has a second end at an end of the fixing section facing the fastening section, and the fixing section has a closed contour in the circumferential direction at the end facing the fastening section, and the spring portion has a hollow shape between the first end and the second end

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP4250495A1Plug contact for a circuit board connection, circuit board connection and method for producing a plug contact for a circuit board connection
Publication Date: 2023.09.27 YAMAICHI ELECTRONICS DEUTSCHLAND GMBH
  • EP4250495A1 patent drawingFigure 1
  • EP4250495A1 patent drawingFigure 2
  • EP4250495A1 patent drawingFigure 3

AI summary

The present invention relates to a plug connector (10) for a printed circuit board connector (100), wherein the plug connector (10) comprises: - a mounting section (20) for attachment to the printed circuit board connector (100); - a fixing section (30) for releasably fixing in an opening (92) of a printed circuit board (90), -- wherein the fixing section (30) is arranged adjacent to the mounting section (20), and -- wherein the fixing section (30) has a spring section (40), --- wherein the spring section (40) has a first end (41) at a distal end (31) of the fixing section (30), and the fixing section (30) has a circumferentially closed contour (34) at the distal end (31), --- wherein the spring section (40) has a second end (42) at an end (32) of the fixing section (30) facing the mounting section (20),and the fixing section (30) at the end (32) facing the fastening section (20) has a circumferentially closed contour (36), and --- wherein the spring section (40) has a hollow shape (50) between the first end (41) and the second end (42). The present invention further relates to a printed circuit board connector (100) with at least one such plug contact (10), the use of such a plug contact (10), and a method for manufacturing such a plug contact (10).