Connector Shielding Shell Fulcrum Structure for Plug Pin Retention
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Solution Overview
Problem
The existing connector shielding shells tilt upwards when a vertical downward force is applied, causing the plug pins to be pulled out of the circuit board due to insufficient force arm and holding torque.
Innovation Solution
A protruding support portion is formed on the lower side edges of the connector shielding shell, acting as a fulcrum to increase the force arm and holding torque of the plug pins, preventing them from being pulled out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the connector shielding shell uses only plug pins for fixation, then the structure is simple, but the holding torque is insufficient and plug pins are pulled out when external force is applied
Solution Approach 1:
The fixation system is segmented into multiple functional elements: plug pins for primary fixation and support portions for secondary support. The support portion is further segmented into a support plane and support edge, creating distributed support points that collectively enhance holding torque without complicating the overall structure.
Solution Approach 2:
The support portion extends in the longitudinal direction beyond the plug pins, adding a spatial dimension to the fixation system. This longitudinal extension creates a longer force arm that increases holding torque, transforming a single-point fixation into a distributed fixation system along the longitudinal axis.
2Reliability
If the support portion is positioned closer to the front port, then the force arm is longer and holding torque is increased, but the support portion may interfere with cable insertion
Solution Approach 1:
The support portion has differentiated local qualities: the support plane provides a broad bearing surface for force distribution, while the support edge provides a precise fulcrum point. The support edge is specifically positioned and shaped to optimize the force arm length without creating excessive protrusion that would interfere with cable insertion.
Solution Approach 2:
The support portion's geometry is optimized by adjusting parameters such as the distance between the support edge and front port, the width of the support plane, and the height of the support edge. These parameter changes allow the force arm to be maximized while maintaining clearance for cable insertion operations.
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
The support portion effectively increases the force arm and reduces external torque, preventing plug pins from being pulled out of the circuit board by increasing the holding torque.
Implementation Method 1
A protruding support portion is formed on lower side edges of a pair of side walls and/or a bottom wall of the connector shielding shell. The support portion is located in front of the front most one in the row of plug pins and is spaced apart from the front most plug pin by a predetermined distance in the longitudinal direction. When a vertical downward external force is applied to a mating connector inserted into the front port of the connector shielding shell, the support portion is pressed against the circuit board as a fulcrum of the connector shielding shell on the circuit board, to increase the force arm and holding torque of each plug pin.
Data Source
AI summary
A connector shielding shell includes a row of plug pins used to press fit into a row of holes in a circuit board to fix the connector shielding shell to the circuit board. A protruding support portion is formed on lower side edges of a pair of side walls and/or a bottom wall of the connector shielding shell. The support portion is located in front of the front most one in the row of plug pins and is spaced apart from the front most plug pin by a predetermined distance in the longitudinal direction. When a vertical downward external force is applied to a mating connector inserted into the front port of the connector shielding shell, the support portion is pressed against the circuit board as a fulcrum of the connector shielding shell on the circuit board, to increase the force arm and holding torque of each plug pin.