Shielded Housing Device for Electronic Key Signal Management
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Solution Overview
Problem
The existing systems for securing electronic keys installed in vehicle interiors lack sufficient security measures, particularly against unauthorized access and misuse.
Innovation Solution
A housing device with a shielding material that blocks a first frequency band signal while allowing a second frequency band signal with a shorter wavelength to pass through, using a trigger signal reception antenna and actuator to operate the electronic key, ensuring only authorized users can access and control vehicle systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a housing with shielding material is used to block first frequency band signals, then security against unauthorized access is improved, but the ability to receive trigger signals and transmit control signals is worsened
Solution Approach 1:
The housing structure implements different electromagnetic properties in different regions: the main housing body uses shielding material to block first frequency band signals for security, while specific localized regions (passage structures) are designed to allow second frequency band signals to pass through. This local differentiation resolves the contradiction by providing both shielding and signal transmission capabilities in appropriate locations.
Solution Approach 2:
The housing is segmented into functional zones: shielding portions for security and passage structures for signal transmission. The passage structures are further segmented into multiple regions (first passage region, second passage region, third passage region) with different configurations optimized for specific signal types, enabling selective signal transmission while maintaining overall shielding effectiveness.
2Reliability
If the housing blocks all external signals for security, then unauthorized access is prevented, but legitimate remote operation becomes impossible
Solution Approach 1:
The housing provides selective signal transmission by creating localized passage structures that allow second frequency band signals (trigger and control signals) to pass through while blocking first frequency band signals. This enables legitimate remote operation through the housing without compromising security against unauthorized first frequency band communications.
Solution Approach 2:
The passage structures act as intermediary elements that mediate between the external environment and the electronic key inside the housing. They selectively transmit authorized second frequency band signals while blocking unauthorized first frequency band signals, enabling controlled interaction without direct exposure.
3Ease of operation
If a passage structure is added to allow second frequency band signals to pass, then remote operation is enabled, but shielding effectiveness against first frequency band signals is reduced
Solution Approach 1:
The passage structure is segmented into multiple functional regions (first passage region for EM waves, second passage region for light, third passage region for heat dissipation) that are optimized for different purposes. This segmentation allows the housing to maintain shielding effectiveness for first frequency band signals while providing controlled transmission paths for second frequency band signals through specific regions.
Solution Approach 2:
Different regions of the passage structure have different electromagnetic properties tailored to their specific functions. The first passage region is designed to allow EM wave transmission for signal communication, while other regions maintain shielding properties, creating local quality variations that resolve the contradiction between signal transmission and shielding effectiveness.
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
Enhances security by preventing unauthorized access to the electronic key and vehicle systems, while allowing legitimate users to remotely operate the key for convenient access and control.
Implementation Method 1
a housing formed by using a material that shields a first signal of a first frequency band transmitted by the in-vehicle device
Implementation Method 2
the housing includes a passage structure that allows a second signal of a second frequency band to pass outside, the second signal being transmitted by the electronic key
Data Source
AI summary
There is provided a housing device configured to store an electronic key configured to perform wireless communication with an in-vehicle device, the housing device comprising: a housing formed by using a material that shields a first signal of a first frequency band transmitted by the in-vehicle device; a trigger signal reception antenna configured to receive a trigger signal transmitted by a portable device; and an actuator disposed inside the housing, and configured to operate an operation section installed in the electronic key based on the trigger signal, wherein the housing includes a passage structure that allows a second signal of a second frequency band to pass outside, the second signal being transmitted by the electronic key, and having a shorter wavelength than a wavelength of the first signal, and the second signal is used to control a control target device installed in the vehicle.