Shield Connector Resin Flange Prevents Rubber Plug Detachment
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Solution Overview
Problem
Conventional shield connectors inadequately prevent the rubber plug from detaching from the housing due to insufficient abutment of the elastically deformable rubber plug body on the outer edge of the electrical-wire insertion hole.
Innovation Solution
A shield connector design featuring a resin member with a secondary cylindrical body and flange portions that are sandwiched between the housing and the outer edge of the electrical-wire insertion hole, ensuring secure attachment and preventing detachment of the rubber plug.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the rubber plug body alone is used for attachment to the housing, then the device complexity is reduced, but the attachment reliability deteriorates due to insufficient abutment
Solution Approach 1:
The resin member is merged with the rubber plug body through embedding, creating an integrated attachment prevention mechanism. The resin member's extended portion engages with the housing's through hole, providing reliable attachment without requiring separate components.
2Reliability
If a dedicated rubber-plug-detachment-prevention member is added, then the attachment reliability is improved, but the device complexity and miniaturization capability deteriorate
Solution Approach 1:
The attachment prevention function is merged into the rubber plug itself through the embedded resin member, eliminating the need for separate detachment prevention components. This integration maintains high attachment reliability while enabling device miniaturization.
Solution Approach 2:
The resin member serves multiple functions: it provides structural support to the rubber plug, prevents inadvertent detachment through engagement with the housing, and enables attachment prevention without additional components. This multi-functionality reduces overall device 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
Effectively prevents the rubber plug from detaching from the housing and reduces the risk of displacement, eliminating the need for additional components like a dedicated rubber-plug-detachment-prevention member, facilitating miniaturization and secure waterproofing.
Implementation Method 1
a resin member (8) made of a synthetic resin different from that of the packing (7), the resin member (8) including a cylindrical body (80) having both ends opened along an axial direction, a pair of flange portions (81) protruding in a flange-like manner from an outer circumferential surface of the cylindrical body (80), wherein both of the flange portions (81) are sandwiched by the housing (4) and an outer edge (51) of the electrical-wire insertion hole (50)
Implementation Method 2
an inner circumferential lip (71) protruding from the inner cylindrical portion (70) and adapted to be firmly attached to an outer circumferential surface of the electrical wire (2)
Data Source
Figure 1
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AI summary
A shield connector (1) comprises a terminal fitting (3) connected to an electrical wire (2), a housing (4) accommodating the terminal fitting, a shield shell (5) covering the housing, and a rubber plug (6, 106) attached to an outer circumference of the electrical wire for waterproofing of the inner space of the housing. The shield shell includes an electrical -wire insertion hole (50) through which the electrical wire is passed. The rubber plug includes a packing (7, 107) and a resin member (8). The resin member includes a cylindrical body (80) and a flange portion (81) protruding in a flange- like manner from an outer circumferential surface of the cylindrical body. In the rubber plug, an end of the cylindrical body along its axis is positioned in the electrical -wire insertion hole. The flange portion is sandwiched by the housing and an outer edge of the electrical -wire insertion hole.