Tamper-Evident Fastening Mechanism with Shielding Element
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Solution Overview
Problem
Users can easily dismantle fastening devices in electronic appliances, leading to potential damage and disputes about the cause of damage when the appliance is serviced, as the exposed fastening components can be removed using simple tools, making it difficult for manufacturers to determine if alterations have been made.
Innovation Solution
A tamper-evident mechanism is introduced, which includes a shielding element inserted into the gap between the fastening device and the housing, rendering the fastening device invisible and difficult to remove, using a ring-shape or cup-shaped shielding element made of rubbery or plastic material to prevent unauthorized dismantling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the fastening device is exposed outside the housing, then the assembly structure is simple and easy to manufacture, but the user can easily dismantle it using simple tools
Solution Approach 1:
The patent introduces a shielding element as an intermediary component between the fastening device and the external environment. This shielding element conceals the fastening device head, preventing users from accessing it with simple tools, while the fastening device itself remains functional for assembly purposes. The shielding element acts as a mediator that preserves both the simplicity of assembly and the security against tampering.
Solution Approach 2:
The shielding element is designed to be inserted into a cavity within the housing, creating a nested structure where the shielding element contains the fastening device head. This nesting approach allows the fastening device to remain exposed for assembly while being protected from unauthorized dismantling, resolving the contradiction between accessibility and security.
2Ease of operation
If the fastening device is exposed outside the housing, then dismantling is easy for users, but manufacturers cannot determine if the product has been altered
Solution Approach 1:
The shielding element serves as an intermediary that prevents direct user access to the fastening device. By concealing the fastening device head, it eliminates the ability of users to easily dismantle the device, thereby preserving product integrity information and allowing manufacturers to determine whether the product has been altered.
Solution Approach 2:
The shielding element is installed in advance to prevent unauthorized dismantling before the product reaches the user or during normal use. This preliminary protective action ensures that any attempt to dismantle the fastening device will be evident, preserving the ability to detect product alterations.
3Reliability
If the shielding element is inserted into the perforation, then the fastening device is protected from dismantling, but the structure becomes more complex
Solution Approach 1:
The shielding element is designed to fit into an existing cavity or perforation in the housing, creating a nested structure that adds minimal complexity. The shielding element contains the fastening device head within the existing housing structure, providing protection without requiring significant structural modifications or additional complex components.
Solution Approach 2:
The shielding element is designed as a simple, inexpensive component that can be easily manufactured and installed. It serves as a cost-effective solution to protect the fastening device, with the complexity added being minimal compared to the protection provided.
Data Source
AI summary
A tamper-evident mechanism for use with an electronic appliance includes a first housing, a second housing, a fastening device and a shielding element. The first housing includes a perforation, which is surrounded by a ring-shape member. The second housing includes a groove corresponding to the perforation of the first housing, wherein the groove has an inner thread formed on a portion of inner wall thereof. The fastening device includes a head portion and a shaft portion, wherein the shaft portion has an external thread engaged with the inner thread of the groove and the head portion is sustained against the ring-shape member, thereby coupling the first housing with the second housing. The shielding element is inserted into the perforation of the first housing for shielding the head portion of the fastening device.