Stacked Card Edge Connector with Movable Lower Segment
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Solution Overview
Problem
Existing card edge connector assemblies face challenges in aligning and inserting hundreds of contacts with corresponding solder pads or through holes on a printed circuit board, particularly in high-density and high-speed transmission applications.
Innovation Solution
A card edge connector assembly comprising an upper and lower connector with elongated mating grooves, guiding grooves, and sliding grooves, along with a metallic member for secure attachment, allows for easy alignment and insertion of solder tails into corresponding holes on a printed circuit board, facilitated by a moveable lower connector and an ejecting device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional card edge connector assembly is used, then the structure is simple, but the alignment of hundreds of contacts with solder pads or through holes becomes difficult in high-density applications
Solution Approach 1:
The connector assembly is divided into an upper connector and a lower connector, each handling specific contact groups. The lower connector is further segmented into a fixed portion and a movable portion, allowing independent adjustment for precise alignment of contacts with solder pads during the soldering process
Solution Approach 2:
The lower connector incorporates a movable portion that can shift relative to the fixed portion, enabling dynamic adjustment during assembly. This movability allows the contact tails to be precisely aligned with the through holes on the printed circuit board, solving the alignment precision problem in high-density applications
2Ease of operation
If the lower connector is fixed, then the structure is stable, but the solder tails cannot be easily inserted into corresponding holes on the printed circuit board
Solution Approach 1:
The lower connector is designed with a movable portion that can shift independently from the fixed portion. This dynamic structure allows the contact tails to be easily inserted into the through holes during assembly while maintaining overall structural stability through the fixed portion and retaining members
Solution Approach 2:
The lower connector is segmented into fixed and movable portions, each serving distinct functions. The fixed portion provides structural stability and positioning, while the movable portion facilitates easy insertion of solder tails, thus resolving the contradiction between stability and ease of operation
3Quantity of substance
If high-density contacts are used, then the transmission capacity increases, but the alignment with solder pads or through holes becomes more difficult
Solution Approach 1:
The connector assembly is segmented into upper and lower connectors, with the lower connector further divided into fixed and movable portions. This segmentation allows each segment to be optimized for its specific function, enabling precise alignment of a large number of contacts in high-density applications
Solution Approach 2:
The movable portion of the lower connector provides dynamic adjustment capability, allowing precise alignment of numerous contacts with corresponding through holes during assembly. This dynamic feature is particularly valuable in high-density applications where alignment precision is critical
Data Source
AI summary
A card edge connector assembly for connecting a pair of electrical cards to a printed circuit board includes an upper connector and a lower connector. The upper connector includes a first housing defining a first elongated mating groove along a longitudinal direction with a plurality of first contacts by two sides thereof, and a recess is defined under the first elongated mating groove. The lower connector is moveably received within said recess and includes a second housing defining a second elongated mating groove with a plurality of second contacts by two sides thereof. A metallic member is attached to the upper connector for preventing the lower connector releasing from said recess.