Tamper-Evident Casing Fastener With Tool-Locked Anti-Disassembly
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Solution Overview
Problem
Electronic products are often damaged when users improperly disassemble them, leading to warranty claims that manufacturers struggle to differentiate between normal use and user tampering.
Innovation Solution
An anti-disassembly device comprising a first and second part, a fixing element, a bolt, an elastic element, and a nail, which are locked or unlocked using a specific tool, making it difficult for users to disassemble the casing without causing damage, and leaving traces that indicate unauthorized disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anti-disassembly devices are installed to prevent unauthorized disassembly, then the ability to detect tampering is improved, but the device complexity increases
Solution Approach 1:
The anti-disassembly device is divided into multiple independent components: a first component with a first through hole and first restriction grooves, a second component with a second through hole and second restriction grooves, a fixing element, a bolt, an elastic element, and a nail. This segmentation allows each component to perform a specific function while maintaining overall system reliability without excessive complexity.
Solution Approach 2:
The nail acts as an intermediary element that connects the first and second components through the through holes and restriction grooves. The elastic element serves as a mediator that provides locking force between the bolt and the components. These intermediary elements enable tamper detection functionality without requiring complex integrated systems.
2Ease of operation
If the anti-disassembly device uses a specific tool for locking and unlocking, then the ease of operation is improved for authorized users, but the device complexity increases due to the specialized mechanism
Solution Approach 1:
The first and second components have asymmetric features including specifically shaped through holes and restriction grooves that only accommodate the corresponding specialized tool. The nail has an asymmetric configuration with a head portion and a body portion that interact with asymmetric features in the components. This asymmetry ensures that only the authorized tool can properly lock and unlock the device, providing ease of operation for intended users while preventing unauthorized access.
3Stability of the object's composition
If the nail is prevented from rotating relative to the components, then the stability of the object's composition is improved, but the ease of operation worsens due to the locking mechanism
Solution Approach 1:
The nail is designed with dynamic characteristics, allowing it to rotate when the specialized tool is used for locking and unlocking operations. The elastic element provides dynamic locking force that maintains stability during normal operation. This dynamic design enables the system to switch between stable (locked) and operational (unlockable) states, resolving the contradiction between stability and ease of operation.
Solution Approach 2:
The elastic element automatically provides locking force to prevent the nail from rotating relative to the components after the tool is removed. The mechanism self-locks without requiring additional components or complex control systems, maintaining stability while allowing easy unlocking when the specialized tool is applied.
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
Prevents unauthorized disassembly, allowing manufacturers to determine responsibility for damages by observing damage to the anti-disassembly device, thus protecting the integrity of the electronic product.
Implementation Method 1
an elastic element, and a nail, which are locked or unlocked using a specific tool
Data Source
AI summary
An electronic apparatus with convenient airflow-reversing function includes a chassis, a rotation mechanism, a fan device, a connection rod, and a handle. The chassis includes a bottom plate. The rotation mechanism is pivoted on the bottom plate. The fan device is disposed on the rotation mechanism. The connection rod is pivoted on the rotation mechanism. The handle is pivoted on the chassis, and is rotatably connected to the connection rod. When the handle is rotated, the connection rod drives the rotation mechanism and the fan device to rotate to change the airflow direction.