Plug Connector With Recessed Blades For Reduced Insertion Force
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Solution Overview
Problem
The increasing number of pads on printed wiring boards requires higher inserting forces and can lead to crosstalk issues when connecting to card-edge connectors, making manual insertion difficult and signal transmission inefficient.
Innovation Solution
A plug connector design featuring recessed surfaces on the blades of the connector-contact arrangements, which reduces the inserting force and minimizes crosstalk by forming a cavity between signal lines, allowing for easy assembly and efficient signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of pads on the printed wiring board is increased to accommodate more signal connections, then the connectivity and processing capability are improved, but the inserting force required becomes excessively high making manual insertion difficult
Solution Approach 1:
The connector-contact arrangement is divided into multiple levels (first and second levels), with each level having its own contact components. This segmentation allows the total number of contacts to be distributed across multiple insertion stages, reducing the force required at each individual insertion event while maintaining high overall connectivity.
Solution Approach 2:
The patent transitions from a single-level connector arrangement to a multi-level vertical arrangement. The first and second connector-contact arrangements are positioned at different heights, allowing contacts to be made at multiple vertical levels. This dimensional change enables high-density connectivity without proportionally increasing the inserting force.
2Area of stationary object
If the pitch between adjacent pads is reduced to accommodate more connections within the same width, then the space utilization is improved, but the manufacturing precision and assembly difficulty increase
Solution Approach 1:
By arranging connector-contact arrangements at multiple vertical levels rather than packing them horizontally, the patent achieves high connectivity without requiring extremely small pad pitches. The vertical dimension provides additional space for contact components, reducing the demand for precision in the horizontal plane.
3Quantity of substance
If multiple levels of connector-contact arrangements are provided vertically to accommodate increasing pads, then the connectivity capacity is improved, but the inserting force becomes excessively high
Solution Approach 1:
The multi-level connector system is segmented into independent first and second connector-contact arrangements, each with its own set of contact components. This allows the connection process to occur in stages, with each level requiring manageable inserting force, rather than requiring all contacts to be made simultaneously with excessive force.
Solution Approach 2:
The patent employs elastically-deformable contact electrodes that can dynamically adjust during the insertion process. These contact components deform to accommodate the printed wiring board, providing a progressive engagement that reduces peak inserting force while maintaining reliable electrical connection.
4Ease of operation
If the printed wiring board is chamfered to reduce resistance in deforming contact electrodes, then the insertion smoothness is improved, but the surface becomes rough with surfaced-out resins and glass fibers increasing friction
Solution Approach 1:
Instead of chamfering the printed wiring board after fabrication (which causes surface roughening), the patent incorporates recessed surfaces directly into the mold during manufacturing. This preliminary action creates the necessary guiding surfaces without subsequent machining, avoiding the exposure of resins and glass fibers that would increase friction.
Solution Approach 2:
The patent changes the manufacturing approach from post-fabrication chamfering to mold-integrated recessed surfaces. This parameter change in the manufacturing process eliminates the harmful side effect of surface roughening while maintaining the beneficial function of guiding the insertion and reducing contact resistance.
Data Source
AI summary
A plug connector for electrically connecting a printed wiring board with a card-edge connector includes a first connector-contact arrangement and a second connector-contact arrangement. The first connector-contact arrangement is inserted to the card-edge connector and includes a first blade with a front surface having a recessed surface partly recessed therefrom and a plurality of first contact components arranged parallel one with another in the first blade. The second connector-contact arrangement is inserted to a card-edge connector and includes a second blade with a front surface having a recessed surface partly recessed therefrom and a plurality of second contact components arranged parallel one with another in the second blade. When a plug connector is formed by assembling the first and second connector-contact arrangements together, the first connector-contact arrangement is electrically connected with one printed wiring board through press-contact or push-contact while the second connector-contact arrangement is electrically connected therewith through clamp-contact.