Board Connector J-Shaped Boss Prevents Detachment
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Solution Overview
Problem
Conventional board connectors are prone to detachment from the board due to rotational forces applied during cable operation, and connectors with resilient engagement pieces can disengage if one piece is detached, leading to instability.
Innovation Solution
A board connector design featuring an L-shaped pin terminal and a J-shaped boss with a protrusion and end, where the boss is integrated with the housing and passes through a second through hole, providing additional engagement points to prevent detachment by abutting the board surface when rotational forces are applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a retaining engagement claw is used to engage with the board, then the connector can be attached to the board, but when a great upward force is applied, the housing rotates around the pin support point, the retaining engagement claw becomes less engaged and is released
Solution Approach 1:
The boss is divided into multiple functional segments: a base portion inserted into the through hole, a protrusion extending from the first main surface, an inversion portion extending in the opposite direction, and an end portion extending toward the board. This segmentation allows each part to perform a specific function in resisting detachment forces.
Solution Approach 2:
The boss extends in multiple directions (upward from the first surface, downward through the board, and toward the board from the second surface), creating engagement points in different spatial dimensions. This multi-dimensional engagement prevents rotation and detachment more effectively than single-direction engagement structures.
2Reliability
If resilient engagement pieces are used to engage with the board at two positions, then anchoring effect is achieved, but when one piece is detached, the other piece will also be disengaged
Solution Approach 1:
The boss has an asymmetric structure where the protrusion and end portions engage with the board at different positions and in different directions. The inversion portion extends in the opposite direction to the insertion, creating an asymmetric engagement pattern that prevents sequential disengagement.
Solution Approach 2:
The boss is pre-configured with multiple engagement points (protrusion engaging with the first main surface and end engaging with the board near the second main surface) that work together to prevent detachment before any single engagement point fails.
3Reliability
If the boss extends in the opposite direction to the insertion and further extends toward the board, then additional engagement points are created to prevent detachment, but the structural complexity increases
Solution Approach 1:
The base, protrusion, inversion portion, and end are formed as a single integrated boss structure that is monolithic with the housing. This merging of multiple functional elements into one component achieves complex engagement without requiring separate parts or assembly steps.
Solution Approach 2:
The boss serves multiple functions simultaneously: it provides mechanical engagement with the board through the protrusion and end portions, acts as a structural support element, and prevents both detachment and rotation of the connector. This multi-functionality reduces the need for additional separate components.
Data Source
AI summary
A board connector includes: an L-shaped pin terminal including an insertion inserted into a through hole in a printed board and a conductor swaging part extending in a direction (+Y-axis direction) orthogonal to the insertion; and a housing disposed on one main surface (flat face on the +Z side) of the printed board, the housing containing at least an end of the conductor swaging part and having an opening into which a cable connected to the conductor swaging part is inserted. The board connector further includes a J-shaped boss formed integrally with the housing, the boss passing through a through hole in the printed board and protruding from another main surface (flat face on the −Z side) of the printed board, extending in a direction (D2) (the +Y-axis direction) opposite to a direction toward the insertion, and further extending toward the printed board.