Fuse Holder Clamping Layout for Compact Multi-Country Power Converters
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Solution Overview
Problem
Conventional multi-country power converters face safety hazards due to electrical leakage and occupy excessive space, with fuse tubes prone to disconnection and electric shock risks, especially when used by children, and lack compact design.
Innovation Solution
An overload prevention device with a fuse holder and conductive pieces that securely clamp and conduct the fuse tube, ensuring stable mounting and smooth conduction, featuring a clamping mechanism to prevent disconnection and reduce product size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive terminal is provided through the side wall of the plug hole to be in electrical contact with the fuse tube, then it is easy to generate electrical leakage during use, but this structure occupies product space
Solution Approach 1:
The conductive terminal is extracted from the side wall of the plug hole and repositioned to contact the fuse tube through the bottom surface. This extraction eliminates the electrical leakage path through the side wall while maintaining the electrical connection function, thereby improving safety without occupying additional product space.
Solution Approach 2:
The contact point between the conductive terminal and fuse tube is moved from a lateral position (side wall) to a vertical position (bottom surface). This dimensional change in the contact arrangement eliminates the harmful electrical leakage path while preserving the necessary electrical connection, resolving the contradiction between safety and space utilization.
2Reliability
If the fuse tube is not completely placed in the contact surface between the plug and the socket, then the fuse tube will have the risk of being pulled out, but this configuration allows easier installation
Solution Approach 1:
The conductive terminal is pre-positioned to contact the fuse tube at the bottom surface before the plug is fully inserted into the socket. This preliminary contact ensures that the electrical connection is established and the fuse tube is secured in place before any pulling force is applied, preventing accidental disconnection while maintaining easy installation.
Solution Approach 2:
The bottom surface contact arrangement provides a preliminary securing mechanism that cushions against the risk of the fuse tube being pulled out. By establishing the electrical and mechanical connection at the bottom surface first, the design prevents the harmful scenario of incomplete insertion and potential disconnection, while still allowing for simple installation.
3Reliability
If the fuse tube is completely enclosed in the housing, then safety is improved, but the structure becomes more complex
Solution Approach 1:
The conductive terminal is merged with the housing structure, eliminating the need for separate components. The terminal is integrated into the housing such that it contacts the fuse tube through the bottom surface, providing both structural support and electrical connection functions in a single integrated component, thereby improving safety without increasing complexity.
Solution Approach 2:
The housing structure is given multiple functions: it provides mechanical enclosure for safety, structural support, and integrates the conductive terminal for electrical connection. By making the housing multi-functional, the design achieves improved safety through complete enclosure without adding separate components, thus avoiding increased structural complexity.
Data Source
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AI summary
The present utility model discloses an overload prevention device for a multi-country power converter, comprising an upper cover of a main body, a lower cover of the main body, a US-standard pin assembly and an UK-standard pin assembly, wherein a socket hole is formed on the upper cover of the main body. The present utility model further comprises a fuse holder detachably mounted in the lower cover of the main body, a fuse tube mounted in the fuse holder, a lower conductive piece and an upper conductive piece; a mounting frame is formed in the fuse holder, and the fuse tube is mounted in the mounting frame; the lower conductive piece comprises a clamping part of the lower conductive piece capable of clamping and conducting the lower part of the fuse tube; the UK-standard pin assembly and the US-standard pin assembly are respectively connected with the lower conductive piece in a plug-in manner; the upper conductive piece comprises an clamping part of the upper conductive piece capable of clamping and conducting the upper part of the fuse tube; and the upper conductive piece is electrically connected to the socket hole. It is easy to pull out and mount the utility model. The structure is stable after being mounted. The conduction is smooth and the safety is high, which effectively protects the circuit of the power converter to prevent overload of the circuit and the problem of people pulling out incorrectly during use. The volume of the product can also be made smaller.