Electric Connection Box Cover-Integrated Terminal Block Assembly
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Solution Overview
Problem
Conventional electric connection boxes require complex assembly processes and reduced workability due to the need to assemble both internal and external electric parts and wires, especially during emergency or maintenance operations, where improved assembly efficiency is necessary.
Innovation Solution
An electric connection box design featuring an insulating casing with internal electric parts and a terminal block with a holding member integrated into a removable member, allowing for improved assembly workability by integrating the terminal block's holding member with the removable cover of the casing, enhancing the assembly process and reducing the need for separate assembly steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electric parts are disposed outside the casing, then workability during predetermined work is improved, but assembly workability at the time of manufacturing deteriorates due to the need to assemble both the electric connection box and electric parts separately
Solution Approach 1:
The terminal block holding member is integrated with the removable member (cover) of the casing, combining the functions of the cover and the terminal block mounting structure into a single component. This allows the terminal block to be disposed outside the casing while maintaining simplified assembly, as the integrated structure is assembled as one unit rather than separate components.
2Volume of moving object
If electric parts are accommodated inside the casing, then the structure is more compact, but workability during predetermined work deteriorates due to the need to remove the cover to access electric parts
Solution Approach 1:
The casing is divided into a fixed portion and a removable member (cover) that can be detached. The terminal block with electric parts is disposed outside the fixed portion but integrated with the removable member, allowing the cover to be removed to access the terminal block without disturbing the internal electric parts accommodated inside the casing.
Solution Approach 2:
The removable member acts as an intermediary that provides access to the terminal block disposed outside the casing. By attaching or detaching this removable member, workers can access the terminal block for predetermined work while the internal electric parts remain protected inside the casing.
3Ease of manufacture
If terminal block is disposed outside the casing, then assembly process is simplified, but the structure becomes more complex due to the need for integrated holding member with removable member
Solution Approach 1:
The holding member for the terminal block is merged with the removable member (cover) into a single integrated component. This integration simplifies the assembly process by reducing the number of separate parts, and while it increases the complexity of the removable member itself, the overall structure becomes simpler due to fewer assembly steps and components.
Data Source
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AI summary
An electric connection box includes: an insulating casing (10); at least one internal electric part that is accommodated inside the casing (10) and is electrically connected to a plurality of internal electric wires (We1) drawn from an inside to an outside of the casing (10); and a terminal block (20) that is provided with at least one external electric part (30) electrically connected to at least one external electric wire (We2) and is assembled into the casing (10) outside the casing (10). The casing (10) includes an accommodation member (10A) that accommodates the internal electric part, and a removable member (10D) that is attached to and detached from the accommodation member (10A). The terminal block (20) includes a holding member (40) that holds the external electric part (30). The holding member (40) is formed as one part integrated with the removable member (10D).