Terminal Fitting Structure for Flexible Board Tensile Relief
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Solution Overview
Problem
In existing terminal fittings, when a printed wiring board is pulled away from the terminal fitting, the tensile force directly acts on the connected part, leading to potential separation from the terminal fitting.
Innovation Solution
A terminal fitting design featuring a connecting portion for flexible printed wiring plates and a fixing portion located at the rear end, which absorbs the tensile force, preventing separation by distributing it across the entire fitting and enhancing the connection strength through a crimping and biting mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the terminal fitting is directly connected to the printed wiring board, then the connection is simple and direct, but the tensile force directly acts on the connected part causing potential separation
Solution Approach 1:
The terminal fitting is divided into two functional parts: a connecting portion for electrical connection to the printed wiring board and a fixing portion for mechanical anchoring in the rear end part. This segmentation allows the connecting portion to maintain simple electrical connection while the fixing portion provides separate mechanical support to resist tensile forces, preventing separation without complicating the connection structure.
Solution Approach 2:
The fixing portion acts as an intermediary element between the terminal fitting body and the printed wiring board. It provides an additional anchoring point in the rear end part that mediates the mechanical stress, distributing tensile forces away from the connected part and enhancing connection reliability without interfering with the simple electrical connection function.
2Strength
If the fixing portion is added to the rear end part, then the tensile force is distributed and connection strength is improved, but the device structure becomes more complex
Solution Approach 1:
The fixing portion is merged with the terminal fitting body as an integrated component rather than a separate part. This combining approach allows the fixing portion to be formed simultaneously with the main body during manufacturing, providing enhanced connection strength through distributed tensile force resistance without significantly increasing overall device complexity or requiring additional assembly steps.
Data Source
AI summary
It is aimed to suppress the application of a tensile force to a connected part of a terminal fitting and a flexible printed board. A terminal fitting (10) is provided with a connecting portion (14) to be connected to a front end part (24) of a flexible printed wiring plate (20) and a fixing portion (16) located rearward of the connecting portion (14) in a rear end part (10A) and fixed to the flexible printed wiring plate (20).