Connector Position Assurance Sleeve for Miniaturized Plug Housings
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Solution Overview
Problem
Conventional connector position assurance (CPA) systems face challenges in miniaturization due to production difficulties, entanglement issues, and increased rejection rates, which hinder the secure positioning of plug housings and lead to unwanted cable entanglement and damage, especially in the motor vehicle industry where safety is a concern.
Innovation Solution
A CPA design featuring a housing with a through-going aperture that acts as a guiding sleeve, eliminating the need for lateral arms and providing a robust, three-dimensional structure that minimizes entrapment sites and facilitates reliable production, allowing for miniaturization of contact gaps to as small as 0.5 mm without increasing the plug housing dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional multi-arm CPAs are used, then connector position assurance is provided, but production reliability decreases and rejection rates increase due to difficult manufacturing and entanglement
Solution Approach 1:
The patent transitions from a two-dimensional multi-arm CPA structure to a three-dimensional sleeve-type housing with a single interlocking element. This dimensional change eliminates the entanglement problems and manufacturing difficulties associated with multiple slender arms, while maintaining the connector position assurance function through the sleeve's guiding structure.
Solution Approach 2:
The patent combines multiple functions (guiding, positioning, and interlocking) into a single integrated sleeve-type housing structure. The through-going aperture provides guiding functionality while the single interlocking element provides locking functionality, eliminating the need for separate multi-arm structures and reducing manufacturing complexity.
2Manufacturing precision
If multi-arm CPA structures are used, then connector positioning is achieved, but the plug housing dimensions must be increased to accommodate guiding structures
Solution Approach 1:
The patent uses a three-dimensional sleeve structure that provides guiding and positioning functions without requiring lateral space for multiple arms. The through-going aperture of the sleeve provides axial guiding while the interlocking element provides transverse positioning, achieving precise connector positioning without increasing overall plug housing dimensions.
3Reliability
If conventional CPA designs are used, then connector security is provided, but cable entanglement and damage risks increase due to open interlocking apertures
Solution Approach 1:
The patent converts the potential harm of open apertures (cable entanglement risk) into a benefit by using a through-going aperture design that allows cables to pass through safely rather than getting caught on protruding arms. The sleeve structure provides a smooth, continuous surface that eliminates entanglement hazards while maintaining security function.
4Productivity
If miniaturization of contact gaps is pursued, then productivity and space utilization improve, but manufacturing precision and reliability decrease due to smaller tolerances
Solution Approach 1:
The patent changes the structural parameters from multiple slender arms to a single robust sleeve with through-going aperture. This parameter change allows for larger manufacturing tolerances and more robust construction while maintaining miniaturized contact gaps, as the sleeve structure is less sensitive to dimensional variations than multi-arm structures.
Data Source
AI summary
A connector position assurance (CPA) for ensuring the contact position of a plug housing on a mating plug housing includes a housing configured to be pushed onto the plug housing in a mounting direction and a locking element configured to block a latching element of the plug housing. The housing of the CPA has a passage opening configured to receive the plug housing during the mounting process. The locking element is arranged on the housing of the CPA and has a free end that extends along the mounting direction. The locking element is offset toward the outside transverse to the mounting direction in relation to the housing of the CPA in order to keep the risk of interlocking as low as possible. A plug connector arrangement includes the CPA.