Terminal Block Housing Structure to Prevent Wiring Misconnection
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Solution Overview
Problem
In terminal blocks, erroneous connections of power supply lines can lead to short-circuits and damage when multiple blocks are electrically connected, as there is no mechanism to prevent incorrect wiring.
Innovation Solution
The terminal block design includes a protruding portion that acts as an obstructing member, preventing the input-side power supply line from connecting to the input-side power supply terminal, and a through hole that allows the obstructing member to be inserted, ensuring correct alignment and preventing erroneous connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple terminal blocks are electrically connected without connection prevention mechanisms, then electrical connectivity is achieved, but erroneous connections causing short-circuits and damage may occur
Solution Approach 1:
The protruding portion acts as an intermediary obstructing member that physically blocks the connection between the input-side power supply line and terminal, preventing erroneous connections while allowing correct connections to proceed. This mediator element resolves the contradiction by introducing a simple mechanical barrier that enhances reliability without significantly complicating the overall device structure.
2Object-affected harmful factors
If a protruding obstructing member is added to prevent erroneous connections, then connection safety is improved, but device structure becomes more complex
Solution Approach 1:
The protruding portion is designed to serve multiple functions: it acts as an obstructing member to prevent erroneous connections, provides structural support within the housing, and guides the correct positioning of connecting wires. By making this single element multi-functional, the patent reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving effective prevention of harmful factors.
3Ease of operation
If terminal blocks are designed for easy electrical connection, then ease of operation is improved, but risk of erroneous connection increases
Solution Approach 1:
The protruding obstructing member is pre-positioned within the housing to anticipate and prevent erroneous connections before they can occur. This preliminary protective action is built into the structure, so that during operation, users can easily connect wires without needing to worry about making erroneous connections, as the physical barrier automatically prevents them. This resolves the contradiction by maintaining ease of operation while improving connection accuracy through pre-designed structural guidance.
Data Source
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AI summary
A terminal block which can be coupled to another terminal block in an electrically connected state includes a housing, an input-side power supply terminal and an output-side power supply terminal. The housing includes a first wall portion and a second wall portion. The input-side power supply terminal and the output-side power supply terminal are arranged along the second wall portion inside the housing. The housing includes a protruding portion that functions as an obstructing member that hinders connection of the input-side power supply line to the input-side power supply terminal and a through hole that is arranged in a vicinity of the input-side power supply terminal of the second wall portion and penetrates the second wall portion in the first direction to allow insertion of the obstructing member.