Two-Part Sensor EMI Shield for Compact Damage-Resistant Assembly
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Solution Overview
Problem
Conventional electromagnetic interference (EMI) shields for sensors in compact electronic devices are vulnerable to damage during handling and increase the device's size, complicating assembly and reducing space efficiency.
Innovation Solution
A two-part external metal shield for sensors, comprising a first and second portion with interlocking profiles and secure attachment mechanisms, which are installed along different axes to maintain tight tolerances and minimize damage risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional EMI shield is used to protect the sensor, then electromagnetic interference is reduced, but the device size increases and space efficiency decreases
Solution Approach 1:
The EMI shield is divided into two separate portions that can be independently manufactured and assembled. The first portion includes a first part of an interfacing profile with tabs, while the second portion includes a second part of the interfacing profile. This segmentation allows each portion to be optimized for specific functions and enables tighter integration with the sensor assembly, reducing overall device volume while maintaining EMI protection effectiveness.
2Object-affected harmful factors
If a conventional EMI shield is used to protect the sensor, then electromagnetic interference is reduced, but the shield becomes vulnerable to damage during handling
Solution Approach 1:
By dividing the shield into two portions with complementary interfacing profiles, the design eliminates the need for a single large fragile shield. The tabs on the first portion engage with corresponding features on the second portion, creating a distributed structural system that is more resistant to handling damage while maintaining EMI shielding effectiveness.
3Volume of moving object
If close-coupled components are used to achieve compact form factor, then device size is reduced, but assembly complexity increases and handling becomes more difficult
Solution Approach 1:
The shield is segmented into two portions that can be assembled separately from the sensor. The first portion is installed onto the sensor along a first axis, and the second portion is installed along a second axis orthogonal to the first axis. This modular approach simplifies the assembly process by allowing components to be handled and positioned independently, reducing the complexity of managing close-coupled components during assembly.
4Volume of moving object
If a two-part shield is used to reduce EMI and minimize size, then space efficiency is improved, but the interfacing profile must be precisely manufactured
Solution Approach 1:
The interfacing profile is divided into two complementary parts that fit together. The first part of the interfacing profile on the first portion engages with the second part on the second portion through tab-to-recess connections. This segmentation allows each portion to be manufactured with standard tolerances while achieving precise alignment through the complementary geometry of the interfacing profiles, reducing the overall manufacturing precision requirements compared to a single-piece shield.
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 two-part shield effectively reduces EMI while minimizing device size and vulnerability to damage, ensuring secure attachment and efficient packaging.
Implementation Method 1
an electromagnetic shield defining a cavity within which is received the sensor
Data Source
AI summary
A two-part external metal shield for electromagnetic interference reduction that reduces vulnerability of a shielded sensor is provided. An example electromagnetic shield for a sensor includes: a first portion defining a first part of an interfacing profile and one or more tabs; a second portion defining a second part of an interfacing profile; where the first portion and the second portion combine to form a cavity into which the sensor is received, where the one or more tabs extends into the cavity along a first axis, and where the first part of the interfacing profile is secured to the second part of the interfacing profile along a second axis perpendicular to the first axis.