Audio Jack Housing Snout Alignment and Plastic Opening
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Solution Overview
Problem
The existing audio jacks in computing devices often suffer from shorting issues due to contact between conductive audio plugs and metal housings, which can be exacerbated by misalignment of insulation rings during manufacturing, leading to defects.
Innovation Solution
An audio jack housing with a snout that abuts the interior edge of a plastic opening in the chassis, preventing protrusion and using alignment features like chamfered surfaces and cylindrical ribs to ensure concentric alignment, reducing the risk of shorting and facilitating smooth plug insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal audio jack opening is used in a metal housing, then the structural integrity and conductivity are maintained, but contact with metal audio plugs causes shorting
Solution Approach 1:
The housing is segmented into metal and plastic portions, with the plastic portion specifically positioned at the opening to prevent shorting while maintaining metal housing benefits elsewhere. This segmentation allows different materials to serve different functional requirements within the same housing structure.
Solution Approach 2:
The housing material changes locally from metal to plastic at the opening area where audio plug contact occurs. This local quality change ensures shorting prevention exactly where needed (at the opening) while maintaining the overall metal housing structure for structural integrity.
2Reliability
If a concentric insulation ring is inserted to buffer the plug from the conductive housing, then shorting is prevented, but alignment accuracy deteriorates causing manufacturing defects
Solution Approach 1:
The insulating function is merged into the housing structure itself through the plastic portion, eliminating the need for a separate concentric insulation ring. This integration removes the alignment issues associated with inserting separate components while maintaining the shorting prevention function.
Solution Approach 2:
The problematic concentric insulation ring component is extracted/removed from the design. Instead, the insulating function is achieved through the plastic portion of the housing that is inherently part of the structure, avoiding alignment and manufacturing defect issues.
3Ease of manufacture
If the snout protrudes into the opening, then the audio jack housing can be mounted, but it creates gaps and misalignment with the opening edge
Solution Approach 1:
Instead of having the snout protrude into the opening to achieve mounting, the design inverts this approach by having the snout abut the interior edge from within. This reversal maintains mounting capability while eliminating protrusion-induced misalignment and gaps.
Solution Approach 2:
The snout is designed with asymmetric positioning relative to the opening, where it abuts the interior edge at a specific position rather than being symmetrically centered or protruding. This asymmetric design ensures proper alignment and eliminates gaps between the snout and opening edge.
Data Source
AI summary
Technologies are described for an audio jack housing configured to concentrically align with an opening in a chassis of a computing device and to accept a plug associated with external audio components. When the housing is aligned with the opening, a snout of the audio jack housing abuts an interior surface of the opening and does not protrude into the opening. The chassis where the opening is located may be constructed from a plastic material to reduce a risk of shorting-out when a metal plug is inserted into the housing. The chassis may include alignment features to concentrically align the audio jack housing with the opening during assembly, such that interior edges of the opening and interior edges of the snout are flush creating a smooth interior entry into the audio jack housing through the opening and the snout.