Interlocking Shield Can Assembly for Slim Electronic Devices
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Solution Overview
Problem
Existing shield can assemblies for electronic devices are inefficient in terms of space usage, particularly in miniaturized and slimmed devices, and struggle to accommodate multiple electronic function groups on printed circuit boards (PCBs) while effectively shielding electromagnetic waves.
Innovation Solution
A shield can assembly featuring two shielding covers with alternating protrusion and recess portions that share a single boundary ground line on the PCB, allowing for efficient space utilization and reduced thickness, and a frame fixing type assembly where covers are secured using tension ribs and frames for enhanced shielding and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional shield can mounting methods (mechanical coupling, clip-type coupling, or frame-type coupling) are used, then electromagnetic shielding is achieved, but the device size increases and space efficiency decreases
Solution Approach 1:
The patent merges the shielding cover and ground electrode into a single integrated component. The shielding cover directly contacts the ground line on the PCB, eliminating the need for separate mounting structures like frames or clips. This integration maintains electromagnetic shielding effectiveness while significantly reducing the overall device volume and improving space efficiency.
Solution Approach 2:
The patent extracts the ground electrode function from the mounting structure and integrates it directly into the shielding cover. By making the shielding cover itself the ground electrode through direct contact with the ground line, the design eliminates redundant structural elements and reduces device size while maintaining shielding performance.
2Object-affected harmful factors
If multiple shield cans are mounted on the PCB to shield different electronic function groups, then electromagnetic interference is reduced, but the PCB area occupied increases
Solution Approach 1:
The patent merges multiple shielding functions into a single integrated shielding cover structure. Adjacent shielding covers are designed with interlocking protrusion and recess portions that allow them to share boundary ground lines, effectively combining multiple shielding zones into a compact arrangement that minimizes PCB area occupation while maintaining EMI protection for multiple electronic function groups.
Solution Approach 2:
The patent employs asymmetric design in the form of protrusion and recess portions on adjacent shielding covers. These asymmetric features allow the covers to interlock and share ground lines efficiently, optimizing the arrangement to minimize the total PCB area required while maintaining effective electromagnetic shielding for multiple separate function groups.
3Object-affected harmful factors
If shield cans are added to shield electronic function groups, then electromagnetic compatibility is improved, but the device thickness increases
Solution Approach 1:
The patent merges the shielding function with the ground connection function into a single thin structure. The shielding cover directly contacts the ground line on the PCB without requiring additional thickness for separate mounting structures. This integration maintains effective electromagnetic shielding while minimizing the device thickness, enabling slimmed electronic device design.
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 solution enables more efficient space usage, reduces the overall volume of the shield can assembly, and allows for the mounting of additional electronic function groups on PCBs, contributing to the slimness of electronic devices while maintaining effective electromagnetic shielding.
Implementation Method 1
the first and second shielding covers 2, 3 electrically connected to the ground line 41 to shield electronic function groups 42 mounted on the PCB 4
Data Source
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AI summary
An electronic device includes a printed circuit board (PCB), a first cover disposed to shield a first region of the PCB, and a second cover for shielding a second region which has at least a boundary with the first region. A corresponding boundary portion the first cover and the second cover include at least one protrusion portion and at least one recess portion which are fitted to face each other. Thus, since at least two shielding covers share the single boundary region, the component mounting region of the PCB can be efficiently utilized to thus contribute to slimness of the electronic device.