Terminal Holder Attachment Structure Without PCB Screw Fastening
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional device substrate attachment structures using screw fastening result in a significant reduction of usable substrate area due to 'forbidden bands', increased cost, and potential for screw holes to become loose, complicating attachment and detachment processes.
Innovation Solution
A substrate attachment structure that utilizes an engagement/disengagement mechanism with a terminal holder as the attachment member, eliminating the need for screws by using a bifurcated rib and clamping piece to secure the substrate to a frame, reducing the number of parts and assembly time, and minimizing forbidden bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screw fastening is used to attach substrate to frame, then attachment reliability is improved, but substrate area is reduced due to forbidden bands
Solution Approach 1:
The terminal holder is merged with the attachment member, integrating the function of holding terminals and attaching the substrate to the frame into a single component. This eliminates the need for separate attachment screws and reduces forbidden bands on the substrate.
Solution Approach 2:
The terminal holder serves multiple functions: it holds electrical terminals, acts as an attachment member to secure the substrate to the frame, and provides structural support. This multi-functionality eliminates the need for separate attachment hardware.
2Strength
If attachment screws are used to fasten substrate to frame, then attachment strength is improved, but screw holes become loose over time reducing reliability
Solution Approach 1:
The attachment structure uses elastic deformation of the terminal holder and frame materials to maintain continuous contact pressure and attachment strength, rather than relying on static screw fastening that can become loose over time.
3Reliability
If conventional screw fastening structure is used, then attachment is secure, but device complexity increases due to multiple parts
Solution Approach 1:
The terminal holder is merged with the attachment member, integrating the function of holding terminals and attaching the substrate to the frame into a single component. This eliminates the need for separate attachment screws and reduces forbidden bands on the substrate.
Solution Approach 2:
The terminal holder serves multiple functions: it holds electrical terminals, acts as an attachment member to secure the substrate to the frame, and provides structural support. This multi-functionality eliminates the need for separate attachment hardware.
4Reliability
If conventional screw fastening is used, then attachment is reliable, but assembly time increases
Solution Approach 1:
The terminal holder is pre-formed as an integral attachment member during terminal holder manufacturing, eliminating the need for separate attachment screw installation steps during assembly.
Data Source
AI summary
In a device substrate attachment structure, when a substrate including a terminal holder attached to an end portion thereof is attached to a frame made of sheet metal, the substrate is attached to the frame via the terminal holder without using a screw fastening structure. The terminal holder is attached to the frame via an engagement/disengagement mechanism. The engagement/disengagement mechanism includes through-hole portions on a side of the frame, a seat portion, claw portions, and leg portions on the side of the terminal holder, and a positioning mechanism on the side of a cabinet. The positioning mechanism includes rim portions of an opening window of the cabinet.