Board-to-board connector
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Solution Overview
Problem
Existing board-to-board connectors face a conflict between achieving optimal transmission characteristics and spring characteristics due to the conflicting design requirements of a short transmission path length and a long elastic piece.
Innovation Solution
A board-to-board connector design with a contact that includes a mounting part soldered to an electrode pad, a spring part extending from the mounting part, and a restrained part secured by a housing, allowing the spring part to transition from a restrained to a released state as the contact part displaces, thereby maintaining high transmission and spring characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the elastic piece is made long to improve spring characteristics, then spring characteristics are improved, but the transmission path length increases and transmission characteristics deteriorate
Solution Approach 1:
The contact is divided into three functional segments: a mounting part for soldering to the first electrode pad, a spring part providing elastic force, and a restrained part that transitions between restrained and released states. This segmentation allows each part to be optimized for its specific function while working together as an integrated whole, resolving the contradiction between transmission path length and spring characteristics
Solution Approach 2:
The restrained part is designed to dynamically transition between a restrained state (when not in contact with the second board) and a released state (when pressed against the second board). This dynamic behavior allows the contact to maintain short transmission path length while providing adequate spring characteristics through state transformation rather than simply increasing length
2Length of moving object
If the transmission path length is shortened to improve transmission characteristics, then transmission characteristics are improved, but spring characteristics deteriorate
Solution Approach 1:
Different parts of the contact have different structural qualities optimized for their local functions: the mounting part has a structure optimized for soldering and electrical connection, the spring part has a structure optimized for elastic deformation, and the restrained part has a structure optimized for transitioning between restrained and released states. This local quality differentiation allows the overall contact to achieve both short transmission path length and adequate spring characteristics
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 design achieves compatibility between transmission and spring characteristics without extending the transmission path length, ensuring efficient electrical connection and improved spring performance.
Implementation Method 1
the spring part includes a contact part configured to come into contact with the second electrode pad, and a restrained part to be restrained by the housing... the contact part comes into contact with the second electrode pad and is displaced, and thereby the restrained part changes from a restrained state of being restrained by the housing to a released state of not being restrained by the housing
Data Source
AI summary
A board-to-board connector includes a contact and a housing accommodating the contact. The contact includes a mounting part solderable to a main electrode pad, and a spring part extending from the mounting part. The spring part includes a contact part configured to come into contact with the sub-electrode pad, and a restrained part to be restrained by the housing. The mounting part is soldered to the main electrode pad in a state where the restrained part is restrained by the housing. In a state where the mounting part is soldered to the main electrode pad, the contact part comes into contact with the sub-electrode pad and is displaced, and thereby the restrained part changes from a restrained state of being restrained by the housing to a released state of not being restrained by the housing.