Locking Cylinder Antenna Concentric Arrangement
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Solution Overview
Problem
Existing lock cylinders with electronic key systems face high energy consumption due to a large distance between the antenna and the encoder, leading to short maintenance intervals and structural complexity from sliding contacts, which are prone to failure.
Innovation Solution
The coils of the transmission antenna in the core and the antenna in the housing are arranged concentrically, allowing for contactless signal transmission with low energy losses and a reliable connection, while the antenna is positioned away from the housing end face to avoid interference from protective fittings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the antenna is positioned close to the encoder for low energy consumption, then energy efficiency improves, but the core structure blocks the signal path and increases distance
Solution Approach 1:
The transmission antenna is nested within the core structure, specifically positioned in the locking channel area. The antenna is arranged concentrically with the core, allowing it to be surrounded by the core structure while maintaining a short distance to the encoder in the key. This nesting arrangement eliminates the need for signals to traverse the entire core circumference, reducing transmission distance and energy consumption.
2Reliability
If sliding contacts are used to transmit signals from the moving core to the fixed blocking device, then signal transmission is achieved, but the contacts are susceptible to failure and require complex guidance
Solution Approach 1:
The patent replaces the mechanical sliding contact system with a contactless electromagnetic induction system. The transmission antenna in the core and the antenna in the housing communicate signals wirelessly through electromagnetic fields, eliminating mechanical wear and the need for precise mechanical guidance. This substitution dramatically improves reliability and simplifies the overall structure.
3Strength
If protective fittings are arranged on the end face of the housing for mechanical protection, then destruction is prevented, but electrical field transmission is dampened and disrupted
Solution Approach 1:
The antenna is repositioned from the end face of the housing to the side surface of the housing. This spatial relocation in a different dimension allows protective fittings to remain on the end face for mechanical protection while the antenna on the side surface remains unaffected by their electromagnetic interference. The signal transmission path is thus separated from the location of potential interference.
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
This design significantly reduces energy consumption and enhances reliability by minimizing signal interference, leading to longer maintenance intervals and simplified structural complexity.
Implementation Method 1
the coils of the transmission antenna in the core and of the antenna in the housing are arranged concentrically to one another
Data Source
Figure 1~2
AI summary
The lock cylinder (1) has a core (3) having a close channel (5) for introduction of key (6). An antenna (8) for detecting electronic signals of key is arranged in the housing (2). An electronic locking device (7) is arranged in core for optionally blocking or releasing the movement of core in dependence on signals of key. The electrical springy contacts (13) for contacting fixed contacts (18) are arranged on the key. The electrical contacts of core are connected with transmitting antenna (11) for transmitting signals of key to antenna, by electrical conductors (12) arranged in core.