Connector Fixation Stability via Segmented Protrusions
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Solution Overview
Problem
The existing connector design is unstable due to variations in size and shape between arrangement members and the ground member, leading to potential play and rotational deviations.
Innovation Solution
The connector incorporates press-fit protrusions and an island-like protrusion on the arrangement member, which are securely fitted into corresponding holes and protrusion accommodation portions on the ground member, ensuring stable fixation without play and preventing rotational deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ground member is fixed to the arrangement member using holes and protrusions, then the ground member can be secured to the arrangement member, but variations in size and shape between components cause play and instability
Solution Approach 1:
The fixation structure is divided into multiple independent elements: two press-fit protrusions for primary positioning and one island-like protrusion for rotational constraint. This segmentation allows each element to address specific aspects of the fixation problem independently, compensating for manufacturing variations in individual components.
Solution Approach 2:
The island-like protrusion has an asymmetric shape that does not match the symmetric press-fit protrusions. This asymmetric design prevents rotational deviation by ensuring that only one specific orientation allows all protrusions to fit into their corresponding holes, thereby eliminating play caused by manufacturing variations.
2Reliability
If press-fit protrusions are used to fix the ground member, then fixation is achieved, but rotational deviation may occur in the positional relation between components
Solution Approach 1:
The island-like protrusion acts as an intermediary element that mediates between the press-fit protrusions and the ground member. It prevents rotational deviation by providing an additional geometric constraint that locks the relative orientation, thereby stabilizing the positional relation without compromising the fixation strength provided by the press-fit protrusions.
3Manufacturing precision
If multiple protrusions are added to prevent rotational deviation, then positioning accuracy improves, but the device complexity increases
Solution Approach 1:
The island-like protrusion combines multiple functions into a single structural element: it provides rotational constraint, maintains spacing between components, and contributes to overall fixation stability. This merging approach achieves high positioning accuracy without proportionally increasing device complexity, as one element performs multiple positioning tasks simultaneously.
Data Source
AI summary
A connector is mateable with a mating connector along a front-rear direction. The connector includes a contact member and a ground member. The contact member includes a plurality of contacts and an arrangement member. The arrangement member holds and arranges the contacts in a pitch direction perpendicular to the front-rear direction. The arrangement member is provided with two press-fit protrusions and an island-like protrusion. Each of the press-fit protrusions protrudes in a protruding direction perpendicular to both the front-rear direction and the pitch direction. The island-like protrusion protrudes in the protruding direction while extending long in a predetermined direction perpendicular to the protruding direction. The ground member has a plate-like main portion. The main portion of the ground member is formed with two holes and a protrusion accommodation portion. The press-fit protrusions are press-fit into the holes, respectively. The island-like protrusion is accommodated in the protrusion accommodation portion.