Electrical Connector Dustproof Base Guide Wall Fixation
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Solution Overview
Problem
Existing electrical connectors face challenges in achieving reliable dustproof and anti-oxidation effects due to inconsistent fit tolerance between the dustproof cover and the shielding shell, leading to issues with detachment, deformation, and inadequate protection of conductive terminals from dust and moisture.
Innovation Solution
An electrical connector assembly featuring an insulating body with an insertion cavity, elastic contact portions, a metal shell with shielding sheets, and a dustproof base with a tongue and guide walls that fit with the metal shell, ensuring secure fixation and easy detachment, while preventing dust and moisture ingress through the arrangement of elastic pieces and guide walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the dustproof cover is assembled to the electrical connector only by means of a tight fit between the four side walls and the shielding shell, then the structure is simple, but the fit tolerance cannot be controlled resulting in over-tight or over-loose fit
Solution Approach 1:
The dustproof cover is divided into multiple functional parts: side walls for sealing, a tongue for insertion and positioning, and guide walls for alignment. This segmentation allows each part to perform its specific function independently, enabling precise control of fit tolerance while maintaining structural simplicity.
Solution Approach 2:
The tongue acts as an intermediary element between the dustproof cover and the electrical connector body. It provides a dedicated insertion path and positioning feature that mediates the fit between the cover and the connector, ensuring consistent alignment and tolerance control during assembly.
2Reliability
If the fit between the dustproof cover and the shielding shell is over-tight, then the dustproof cover is not easily detached, but the shielding shell may deform due to over-extrusion
Solution Approach 1:
The dustproof cover applies sealing force locally at the interface between the side walls and the shielding shell, rather than distributing force uniformly. The tongue provides localized positioning and support, concentrating the fixation force where needed while preventing over-extrusion of the shielding shell.
Solution Approach 2:
The assembly design allows for dynamic adjustment during the assembly process. The tongue guides the dustproof cover into position, enabling gradual engagement that distributes the assembly force over time, preventing sudden over-extrusion of the shielding shell while ensuring reliable fixation.
3Ease of operation
If the fit between the dustproof cover and the shielding shell is over-loose, then the dustproof cover is easily loosened, but fixing of the dustproof cover is difficult
Solution Approach 1:
The tongue and guide walls perform preliminary alignment and positioning actions before the final sealing engagement. This preliminary action ensures that the dustproof cover is correctly positioned and secured during assembly, making fixation reliable while maintaining ease of detachment when needed.
4Device complexity
If the dustproof cover only has the side walls wrapping the shielding shell, then the structure is simple, but it does not prevent the conductive terminals from contacting dust and moisture inside the docking port
Solution Approach 1:
The protection mechanism is extended from a two-dimensional wrapping of side walls to a three-dimensional sealing structure. The tongue and guide walls create additional sealing surfaces and barriers that extend the protection into the interior space of the docking port, preventing dust and moisture from reaching the conductive terminals without significantly increasing structural complexity.
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 solution provides a secure and easy-to-install dustproof base that effectively blocks external dust and moisture, preventing terminal damage and ensuring good dustproof and anti-oxidation effects both internally and externally.
Implementation Method 1
at least one of the elastic piece and the elastic contact portion elastically abuts the tongue
Implementation Method 2
the guide walls fit with outer wall surfaces of the metal shell, and at least one of the elastic piece and the elastic contact portion elastically abuts the tongue
Data Source
AI summary
An electrical connector assembly, including: an insulating body, concavely provided backward with an insertion cavity at its front end; multiple terminals, each having an elastic contact portion extending into the insertion cavity; a metal shell wrapping the insulating body; a shielding sheet, provided with an elastic piece protruding and extending into the insertion cavity; and a dustproof base, having a tongue and two guide walls located on two sides of the tongue. The guide walls fit with outer wall surfaces of the metal shell to fix and guide the tongue to be horizontally inserted into the insertion cavity. At least one of the elastic piece and the elastic contact portion elastically abuts the tongue to further fix the dustproof base, thus easily fixing the dustproof base.