PCB Fixing Member Bending Suppression
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Solution Overview
Problem
Conventional fixing members for electronic components on printed circuit boards suffer from bending issues due to arm-shaped male connector portions, leading to instability and production challenges during soldering.
Innovation Solution
A fixing member design featuring contact portions formed at one end and male connector portions extending from or near the contact portions, which are soldered to the printed circuit board, suppressing bending and simplifying the manufacturing process by forming these components integrally and using pre-defined soldering lands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If male connector portions are made arm-shaped to enable insertion and engagement with the printed circuit board, then ease of assembly is improved, but structural stability deteriorates due to bending of the male connector portions
Solution Approach 1:
The fixing member is divided into distinct functional segments: contact portions for soldering connection, male connector portions for mechanical engagement, and a connecting portion linking them. This segmentation allows each part to perform its specific function optimally while reducing unwanted interactions between functions.
Solution Approach 2:
The connecting portion is designed to extend in a direction substantially perpendicular to the longitudinal direction of the male connector portions. This dimensional change creates a geometric constraint that prevents bending of the male connector portions while preserving their arm-shaped insertion capability.
2Adaptability or versatility
If male connector portions are extended arm-shaped from the fixing member main body, then adaptability to insertion openings is improved, but manufacturing precision deteriorates due to bending during soldering
Solution Approach 1:
The fixing member is divided into distinct functional segments: contact portions for soldering connection, male connector portions for mechanical engagement, and a connecting portion linking them. This segmentation allows each part to perform its specific function optimally while reducing unwanted interactions between functions.
Solution Approach 2:
The connecting portion is designed to extend in a direction substantially perpendicular to the longitudinal direction of the male connector portions. This dimensional change creates a geometric constraint that prevents bending of the male connector portions while preserving their arm-shaped insertion capability.
3Strength
If lug portions are engaged with opening edges and joined by soldering, then fixing strength is improved, but device complexity increases due to multiple soldering operations
Solution Approach 1:
The contact portions and lug portions are both joined to the printed circuit board through soldering operations that can be performed simultaneously or in close sequence. The connecting portion geometry ensures that soldering the contact portions does not interfere with the lug portions, allowing consolidation of soldering steps.
Solution Approach 2:
The connecting portion is designed to automatically prevent bending of male connector portions during soldering, eliminating the need for additional clamping or support structures. The geometry itself provides the constraint function.
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 ensures stable contact between soldering lands and contact portions, reducing bending of male connector portions and simplifying the soldering process, while also reducing production time and increasing the ease of assembly.
Implementation Method 1
contact portions which come in contact with a soldering land formed at the printed circuit board and are joined to the soldering land by soldering
Data Source
AI summary
The fixing member of the present invention can be mounted to a fixed member that is fixed to a printed circuit board and that is used for fixing the fixed member to the printed circuit board, the fixing member including: a mounting member main body fixed to the fixed member; male connector portions having at tip ends thereof lug portions that are engaged with an opening edge of an insertion opening in the printed circuit board when inserted into the inserting opening; and contact portions that contact with a soldering land formed at the printed circuit board and are joined to the soldering land by soldering when the lug portions are engaged with the opening edge, the contact portions being formed at the mounting portion main body and the male connector portions extend arm-shaped from the mounting portion main body or from the contact portions.