Board-to-Board Connector Spring Part Design for Reliable Contact
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Solution Overview
Problem
The existing board-to-board connector designs face challenges in ensuring the reliability of electrical connections due to uncertainties in the spring length of the spring part, which affects the consistency and durability of the elastic deformation and contact between the contact parts and pads.
Innovation Solution
The proposed board-to-board connector includes a housing with a spring part comprising a contact part, an extended part, and a projection part, where the projection part is press-fitted and extends in the board opposing direction, connecting to the holding part on the first board and extending between the holding part and the second board, ensuring a secure spring length for reliable elastic deformation and contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the spring part structure is simplified, then the device complexity is reduced, but the spring length cannot be secured and electrical connection reliability deteriorates
Solution Approach 1:
The spring part is segmented into three distinct functional portions: a holding part for mechanical attachment, an extended part for spanning the gap between boards, and a contact part for electrical connection. This segmentation allows each portion to be optimized independently, ensuring sufficient spring length and elastic deformation capability while maintaining structural clarity and manufacturing feasibility.
2Reliability
If the spring length is increased, then the electrical connection reliability is improved, but the contact structure becomes more complex
Solution Approach 1:
The spring part serves multiple functions simultaneously: it provides mechanical support through the holding part, spans the dimensional gap between boards through the extended part, and ensures electrical connection through the contact part. This multi-functionality is achieved within a single integrated component rather than through multiple separate parts, thereby improving reliability without proportionally increasing overall structure complexity.
3Speed
If the extended part passes between the holding part and the second board, then the spring length is secured, but the manufacturing precision requirements increase
Solution Approach 1:
Different portions of the spring part have different structural characteristics optimized for their specific functions: the holding part is designed for secure mechanical attachment to the first board, the extended part has sufficient length and flexibility to pass between the holding part and second board, and the contact part is configured for reliable electrical contact with the pad. This localized optimization reduces the need for high overall manufacturing precision while ensuring each critical function is achieved.
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
This design secures the spring length of the spring part, enhancing the reliability of the electrical connection by increasing the amount of elastic deformation and the force applied between the contact part and the pad, thereby improving the overall electrical connection reliability.
Implementation Method 1
the spring part includes a contact part, an extended part, and a projection part... the spring part can be elastically deformed
Implementation Method 2
the spring part includes a contact part, an extended part, and a projection part... the spring part can be elastically deformed... increasing the amount of elastic deformation and the force applied between the contact part and the pad
Data Source
AI summary
A connector according to the present disclosure includes a housing, and a plurality of contacts held in the housing. When a direction in which an input-output board and a CPU board are opposed to each other is called a board opposing direction, each contact includes a holding part, a connecting part, and a spring part. The holding part is extended in a board opposing direction and is held on a housing by press fitting. The spring part includes a contact part, an extended part, and a projection part. The projection part is extended in the board opposing direction and is opposed to the holding part. The connecting part connects an end part of the projection part on the side of the input-output board to an end part of the holding part on the side of the input-output board.