Length-Adjustable Antenna in Signal Shielding Case
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Solution Overview
Problem
Traditional remote car key cases are heavy, inconvenient to carry, and lack adjustable antenna lengths, making them prone to misoperation and signal theft.
Innovation Solution
A signal shielding and transmitting case with a length-adjustable antenna, featuring a remote control part, PCB, control line, signal transmitting antenna, and power transmission part, where the remote control part drives the power transmission part to rotate, enabling the antenna to extend or retract, allowing users to adjust the antenna length and signal intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal key case is used for signal shielding, then signal shielding effectiveness is improved, but weight and size increase making it inconvenient to carry
Solution Approach 1:
The key case is divided into an upper shell and a lower shell that can be separated from each other. This segmentation allows the antenna to extend through a passage connecting the two shells, enabling signal transmission while maintaining shielding when the antenna is retracted. The segmented structure reduces the need for a completely enclosed metal case, thereby reducing weight while preserving shielding effectiveness when needed.
Solution Approach 2:
The antenna is designed to be dynamically adjustable, extending through a passage in the key case. When the antenna is extended, signal transmission is enabled; when retracted, signal shielding is maintained. This dynamic configuration allows the key case to transition between shielding and transmitting states, providing both security and functionality without requiring a heavy fixed structure.
2Reliability
If a metal key case is used for signal shielding, then signal shielding effectiveness is improved, but the key case size increases making it difficult to use with one hand
Solution Approach 1:
By segmenting the key case into separable upper and lower shells with a compact antenna mechanism, the overall size is reduced compared to a fully enclosed metal case. The antenna extends only when needed through a dedicated passage, allowing the main body to remain compact and easy to hold in one hand while still providing effective signal shielding when the antenna is retracted.
3Device complexity
If the antenna length is fixed, then the structure is simple, but the signal transmission intensity cannot be adjusted
Solution Approach 1:
The antenna is designed with adjustable length capability, allowing it to extend to different positions along its passage. This dynamic adjustment enables users to control signal transmission intensity by varying the extended length, providing adaptability for different usage scenarios while maintaining a relatively simple overall structure based on a linear actuation mechanism.
4Productivity
If the antenna is always extended, then signal transmission is always available, but misoperation and signal theft occur when placed in pockets
Solution Approach 1:
The antenna can be dynamically extended or retracted based on usage needs. When placed in a pocket or bag, the antenna remains retracted within the key case, preventing accidental activation and signal interception. When active use is required, the user extends the antenna to enable signal transmission. This dynamic state control eliminates the harmful effects of constant exposure while maintaining signal availability when needed.
Solution Approach 2:
By keeping the antenna retracted by default and requiring intentional extension for signal transmission, the design preliminarily prevents misoperation and signal theft. The retracted state acts as a preliminary protective measure, ensuring that signal transmission only occurs when deliberately activated by the user, thereby preventing unauthorized access or accidental activation in pocket or bag environments.
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
Enables convenient carrying, prevents misoperation, and allows adjustable signal intensity, enhancing security by allowing users to control the antenna length for optimal signal transmission.
Implementation Method 1
the remote control part drives the power transmission part to rotate to drive the antenna driving part to rotate
Implementation Method 2
the antenna driving part drives the control line to move to enable the signal transmitting antenna to stretch out or retreat in the signal shielding case
Implementation Method 3
a signal transmitting antenna, an antenna driving part and a power transmission part, wherein the remote control part is fixedly connected to one side of the signal shielding case
Data Source
AI summary
A signal shielding and transmitting case with a length-adjustable antenna comprises a remote control part, a signal shielding case, and a PCB and an antenna driving part arranged in the signal shielding case, wherein a control line penetrates through the antenna driving part and is fixedly connected to a signal transmitting antenna, and the remote control part can control the length of the signal transmitting antenna stretching out of the signal shielding case based on the gear lever principle to allow users to adjust the intensity of signals transmitted by the signal transmitting antenna freely.