Anti-theft Alarm Device Charging Loop Design
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Solution Overview
Problem
Existing anti-theft alarm devices connected to electronic devices via alarm wires experience voltage decay and slow or incomplete charging due to internal resistance, leading to prolonged charging times.
Innovation Solution
The anti-theft alarm device separates the alarm wire and charging wire, using a unique mechanical structure to shorten the charging wire length and reduce internal resistance, forming a charging loop with a power management module and an alarm loop with an alarm detection module, and employing low-resistance wires and gold-plated contacts for efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the alarm wire is used to provide both alarm and charging functions, then the device complexity is reduced, but the charging efficiency deteriorates due to voltage decay and internal resistance
Solution Approach 1:
The patent divides the originally integrated alarm wire into two separate wires: a dedicated alarm wire for security monitoring and a dedicated charging wire for power transmission. This segmentation allows each wire to be optimized for its specific function, with the charging wire having lower internal resistance and the alarm wire maintaining appropriate length for security coverage, thereby resolving the contradiction between device simplicity and charging efficiency.
2Area of stationary object
If the alarm wire length is increased to ensure security coverage, then the protection area is improved, but the charging efficiency deteriorates due to increased internal resistance
Solution Approach 1:
By separating the alarm and charging functions into different wires, the patent allows the alarm wire to be extended for broader security coverage without compromising charging efficiency. The charging wire can be kept short and low-resistance for optimal power transmission, while the alarm wire extends to provide comprehensive protection area.
Solution Approach 2:
The patent applies different quality requirements to different parts of the system: the charging wire uses low-resistance conductors with specific gauge and material properties optimized for power transmission, while the alarm wire uses standard wiring appropriate for security signaling over longer distances. This local optimization resolves the contradiction between coverage area and charging efficiency.
3Productivity
If the alarm wire internal resistance is reduced to improve charging efficiency, then the charging speed is improved, but the wire length must be shortened which reduces the protection area
Solution Approach 1:
The patent resolves this contradiction by segmenting the alarm and charging functions into separate wires. The charging wire can be optimized with low internal resistance and appropriate length for fast charging, while the alarm wire maintains sufficient length for security coverage. This separation eliminates the trade-off between charging speed and protection area.
4Productivity
If the charging current is increased to reduce charging time, then the productivity is improved, but the voltage decay increases leading to incomplete charging
Solution Approach 1:
The patent applies local quality optimization by using a dedicated charging wire with specifically selected conductor material, gauge, and insulation properties to minimize internal resistance. This allows higher charging currents to be transmitted with minimal voltage decay, enabling both fast charging and complete charging. The wire is engineered with appropriate cross-sectional area and conductivity to handle high currents over the required distance without excessive power loss.
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 minimizes wire loss, reduces charging time, and improves charging quality by maintaining minimal internal resistance and ensuring reliable electrical contact.
Implementation Method 1
The charging wire is used for connecting a charging port of the electronic device... The charging wire is a low-resistance wire
Implementation Method 2
The alarm wire is used for connecting the alarm connecting wire and the main control device
Implementation Method 3
the host further includes an elastic element configured to provide a stress when the charging terminal and the charging contactor are contacted to each other
Data Source
AI summary
An anti-theft alarm device for protecting an electronic device from theft, includes a host, a connecting member and an alarm wire. The host includes a main control device, a charging contactor and an internal connecting wire. The charging contactor is connected to the main control device by the internal connecting wire in the host. The connecting member is fixedly attached to the electronic device and includes a charging terminal, a charging wire and an alarm connecting wire. The charging terminal and the charging wire are electrically connected. The charging wire is for connecting a charging port of the electronic device. The alarm connecting wire is for connecting the alarm wire and the electronic device. The alarm wire is for connecting the alarm connecting wire and the main control device. The charging contactor and the charging terminal are electrically connected when the host and the connecting member are mechanically connected.