Electrical Connection Box With External Circuit Branching Layout
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Solution Overview
Problem
The increasing use of electric wires with larger diameters in vehicles poses challenges in routing them within narrow spaces in electrical connection boxes, leading to potential overloads and difficulties in bending, which can strain the housing and its surroundings.
Innovation Solution
The electrical connection box design includes a circuit branching component disposed outside the frame and tubular portion, with internal conductive members and a cover member to manage power supply and load connections, allowing for routing of thick electric wires outside the frame, thereby reducing overload and improving housing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If electric wires with larger diameter are used for weight reduction and large current, then weight is reduced and current capacity is increased, but routing difficulty increases and overload risk increases
Solution Approach 1:
The patent extracts the circuit branching component from the housing interior and positions it outside the housing. This allows thick, difficult-to-bend electric wires to be routed externally to connect the electronic component with power supplies and loads, eliminating the routing difficulties and overload risks associated with running large-diameter wires through narrow internal spaces
2Power
If electric wires with larger diameter are used, then current capacity is increased, but space requirement increases and routing in narrow spaces becomes difficult
Solution Approach 1:
The circuit branching component is extracted from the housing interior and positioned externally. This configuration allows large-diameter wires carrying high current to be routed outside the housing, preventing space conflicts and making it feasible to use thicker wires for increased current capacity without compromising housing space utilization
3Reliability
If electric wires are routed inside the housing, then electrical connection is achieved, but overload is applied to the periphery and strain is caused
Solution Approach 1:
The circuit branching component is relocated from the housing interior to the exterior. This extraction allows electric wires to be routed externally, eliminating the overload and strain that would be applied to the housing periphery if wires were routed internally, while maintaining reliable electrical connections between components
Solution Approach 2:
The circuit branching component serves as an intermediary element positioned outside the housing. It facilitates electrical connections between electronic components, power supplies, and loads by providing external connection points, thereby mediating the wire routing path and preventing direct strain on the housing structure
Data Source
AI summary
An electrical connection box includes: an electronic component; an internal conductive member; a frame that includes a tubular portion that houses and holds the electronic component and the internal conductive member, a cover member that closes an opening of the tubular portion, and a circuit branching component interposed between an external power supply and an external load outside the frame. The internal conductive member includes a first electrical connection portion and a second electrical connection portion that are physically and electrically connected to the electronic component, and the circuit branching component includes a power supply connection portion that is electrically connected to a power-supply-side electric wire electrically connected to the external power supply and is physically and electrically connected to the second electrical connection portion of the internal conductive member, and a load connection portion electrically connected to a load-side electric wire electrically connected to the external load.