Card Edge Connector Spring Contact for Board Thickness Variation
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Solution Overview
Problem
Existing card edge connectors face issues with varying thickness and outer shape of circuit boards, leading to inconsistent contact pressures and potential electrical conduction problems.
Innovation Solution
A card edge connector design featuring a housing, terminal fitting with a base portion, contact portion, and a spring portion that allows for displacement to adapt to board variations, protected by a box portion and locked by a locking portion, ensuring stable electrical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the connector uses a fixed contact portion, then the structure is simple, but the contact pressure varies when board thickness varies
Solution Approach 1:
The contact portion is designed to be movable rather than fixed, allowing it to adjust its position automatically according to the board thickness. The spring portion provides the elastic force that enables the contact portion to move dynamically, ensuring consistent contact pressure regardless of board variations.
Solution Approach 2:
The spring portion changes its compression state based on board thickness variations, automatically adjusting the contact pressure. When the board is thicker, the spring compresses more; when thinner, it compresses less, thereby maintaining optimal contact pressure across different board specifications.
2Reliability
If the contact portion is made displaceable to adapt to board variations, then the electrical conduction is improved, but the device complexity increases
Solution Approach 1:
The contact portion is designed to be movable rather than fixed, allowing it to adjust its position automatically according to the board thickness. The spring portion provides the elastic force that enables the contact portion to move dynamically, ensuring consistent contact pressure regardless of board variations.
Solution Approach 2:
The spring portion changes its compression state based on board thickness variations, automatically adjusting the contact pressure. When the board is thicker, the spring compresses more; when thinner, it compresses less, thereby maintaining optimal contact pressure across different board specifications.
3Device complexity
If the spring portion is exposed without protection, then the structure is simple, but the spring mechanism may interfere with other components
Solution Approach 1:
The spring portion is nested within the housing structure, which provides protection and defines its movement boundaries. The housing contains the spring mechanism while allowing it to function, preventing interference with external components and other parts of the connector.
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
Improves electrical conduction by allowing the contact portion to adjust to board variations, protecting the spring mechanism, and preventing interference between components, thus maintaining consistent contact pressure.
Implementation Method 1
a spring portion provided between the base portion and the contact portion for displaceably supporting the contact portion
Data Source
AI summary
It is aimed to provide a card edge connector capable of improving electrical conduction between a terminal and a board. A card edge connector (1) is provided with a housing (12) and a terminal fitting (13) including a base portion (13A) to be fixed to the housing (12), a contact portion (13D) to be brought into electrical contact with a circuit board (62) assembled with the housing (12) and a spring portion (13C) provided between the base portion (13A) and the contact portion (13D) for displaceably supporting the contact portion (13D).