Motorcycle Meter Common Power Path Waterproofing
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Solution Overview
Problem
Saddle type vehicles face challenges in protecting the area where the power supply unit is connected from water exposure, as existing configurations do not provide adequate waterproofness for the vehicle meter devices.
Innovation Solution
A common power conduction path is used to supply power to the analog display unit, electronic display unit, display control unit, and communication unit, which are exposed to the outside, ensuring they are protected from water while maintaining a simple power conduction path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power conductors are used for each component (analog display unit, electronic display unit, display control unit, communication unit), then each component can be independently powered, but the complexity of the power conduction path increases and waterproofing becomes more difficult
Solution Approach 1:
The patent combines multiple separate power conductors into a single common power conduction path that supplies power to all components (analog display unit, electronic display unit, display control unit, and communication unit) through one waterproof connection point. This merging approach reduces the number of connection points exposed to water, thereby improving waterproofness while maintaining the ability to power all components independently through the shared conduction path.
2Reliability
If multiple power connection points are provided for different components, then power can be supplied to each component, but the area exposed to water increases making waterproofing more difficult
Solution Approach 1:
The patent merges multiple power connection points into a single common power connection point where the common power conduction path connects to the housing. This single connection point has a smaller exposed area compared to multiple separate connection points, making it easier to implement effective waterproofing measures such as sealing gaskets or waterproof connectors at one location rather than multiple locations.
3Device complexity
If a common power conduction path is used for all components, then the power conduction path becomes simpler and easier to protect from water, but power cannot be independently controlled for each component
Solution Approach 1:
The patent segments the common power conduction path into multiple branches inside the housing, each branch connecting to a specific component (analog display unit, electronic display unit, display control unit, or communication unit). This segmentation allows independent power control for each component while maintaining a single common connection point at the housing exterior, thus achieving both simplicity in the external connection and versatility in internal power distribution.
Solution Approach 2:
The patent introduces an intermediary power distribution structure (such as a circuit board or power distribution unit) inside the housing that receives power from the common power conduction path and distributes it to individual components. This intermediary enables independent power control and routing to each component while the external connection remains a single common point, balancing simplicity and adaptability.
Data Source
AI summary
A motorcycle includes an analog display unit, a liquid crystal display unit, a meter circuit board, a communication unit, a housing, and a meter harness. The analog display unit has a dial plate and a pointer. The liquid crystal display unit is a display for displaying vehicle information. The meter circuit board electronically controls contents displayed on the liquid crystal display unit. The communication unit performs the wireless communication with an external communication terminal. The meter circuit board and the communication unit are disposed within the housing. The meter harness supplies the power with at least the analog display unit, the liquid crystal display unit, the meter circuit board, and the communication unit, and they have a common power conduction path at the outside of the housing.