One-Piece Chassis for PCB Angular Positioning in Imaging Readers
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Solution Overview
Problem
The existing mounting brackets for imaging modules in handheld imaging readers are cumbersome, costly, and prone to failure under shock impacts, leading to potential misalignment of printed circuit boards and degraded reading performance.
Innovation Solution
A one-piece chassis design that automatically positions and secures the printed circuit boards in predetermined planes, eliminating the need for separate mounting brackets and enhancing shock resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate mounting brackets are used to secure PCBs in predetermined planes, then the required angular relationship between PCBs can be maintained, but the assembly becomes cumbersome, costly, and prone to failure under shock impacts
Solution Approach 1:
The patent merges the separate mounting brackets into a single integrated chassis structure. The chassis incorporates multiple mounting surfaces and angular positioning features that previously required separate brackets, thereby simplifying the assembly structure while maintaining the precise angular relationship between the engine PCB and handle PCB.
Solution Approach 2:
The chassis serves multiple functions simultaneously: it provides structural support, maintains predetermined angular relationships between PCBs, and acts as a shock-absorbing foundation. This multi-functional design eliminates the need for separate mounting brackets while preserving manufacturing precision.
2Manufacturing precision
If separate mounting brackets are used to secure PCBs, then the angular relationship can be maintained, but assembly time and manufacturing costs increase
Solution Approach 1:
By combining multiple mounting brackets into a single integrated chassis, the patent reduces the number of assembly steps. The chassis is installed as one unit rather than multiple separate brackets, directly improving assembly speed and productivity while maintaining the required angular precision through built-in positioning features.
3Manufacturing precision
If separate mounting brackets are used, then PCB positioning is achievable, but the structure becomes vulnerable to shock impacts and misalignment
Solution Approach 1:
The integration of mounting functions into a single chassis creates a more robust structure that can better withstand shock impacts. The unified structure distributes mechanical stress more effectively compared to separate brackets, thereby improving reliability and shock resistance while maintaining precise PCB positioning.
Data Source
AI summary
An imaging module for reading targets by image capture is mounted as a unitary assembly within an imaging reader. An imager is mounted on a first printed circuit board (PCB), and an interface connector is mounted on a second PCB. The first PCB is in supporting contact with first chassis walls of a chassis and is positioned to lie in a generally upright, first predetermined plane. The second PCB is in supporting contact with second chassis walls of the chassis and is positioned to lie in a generally tilted, second predetermined plane that is inclined at a tilt angle relative to the first predetermined plane. The first and second chassis walls are constituted as a one-piece support that maintains the tilt angle between the PCBs.