Cargo Screen Lighting Control via Position Feedback
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Solution Overview
Problem
The existing cargo screen structures in leisure vehicles suffer from inefficient lighting usage, where the ceiling-mounted lighting device is obscured when the cargo screen is used, and there is a risk of battery discharge due to careless switching, with additional lighting being wasteful when the cargo screen is not in use and difficult to access.
Innovation Solution
A cargo screen structure with a housing-mounted switch that automatically turns the lighting device on/off based on the winding amount of the screen around a shaft, ensuring the lighting is only active when the cargo screen is in use, featuring a pivotally coupled switch with elastic bias and a separate light source for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a lighting device is installed on the ceiling, then the cargo space becomes bright when the cargo screen is not used, but the lighting device is obscured and useless when the cargo screen is used
Solution Approach 1:
The lighting device is merged with the cargo screen structure by attaching it to the lower side of the cargo screen. This integration ensures that the lighting device moves with the cargo screen and remains visible and usable regardless of whether the cargo screen is in the extended or retracted position, eliminating the contradiction between brightness provision and usability adaptability.
2Ease of operation
If an additional lighting device is installed on the side, then the lighting remains accessible when the cargo screen is used, but the lighting device is wasteful when the cargo screen is not present and inefficient due to side positioning
Solution Approach 1:
The lighting device is combined with the cargo screen assembly rather than being separately mounted on the side. This ensures the lighting is only present and operational when the cargo screen is installed, eliminating waste when the cargo screen is absent. The central positioning on the cargo screen also improves lighting efficiency by providing optimal illumination coverage.
Solution Approach 2:
A switch mechanism is integrated into the housing that automatically detects whether the cargo screen is in the extended or retracted position and accordingly controls the lighting device to turn on or off. This feedback-based control ensures the lighting is only activated when needed (when cargo screen is extended), preventing energy waste when the cargo screen is retracted or not in use.
3Ease of operation
If a switch is provided for manual control, then the user can operate the lighting device at any time, but the battery may be discharged due to careless turning on
Solution Approach 1:
The switch mechanism incorporates feedback based on the cargo screen position. When the cargo screen is extended, the switch automatically activates the lighting device. When the cargo screen is retracted, the switch automatically deactivates the lighting device. This eliminates the need for manual operation while preventing battery discharge from careless or unnecessary lighting activation.
Solution Approach 2:
The lighting control system serves itself by automatically detecting the cargo screen position and controlling the lighting accordingly, without requiring user intervention. The switch mechanism monitors the cargo screen state and autonomously activates or deactivates the lighting, ensuring energy efficiency while maintaining operational convenience.
4Object-affected harmful factors
If the switch is interlocked with the tail gate door, then direct operation is avoided, but the lighting remains continuously on when the cargo screen is not actually used
Solution Approach 1:
The switch mechanism provides feedback specifically based on cargo screen position rather than tail gate door position. The lighting device is activated only when the cargo screen is extended, regardless of tail gate status. This ensures lighting is activated only when actually needed for cargo visibility, preventing continuous operation and unnecessary battery drain.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures convenient and efficient lighting usage, preventing battery discharge and optimizing marketability by automatically controlling the lighting according to the cargo screen's operation, ensuring the lighting is only active when needed.
Implementation Method 1
an elastic body provided between the switch and the hinge axis to elastically support the switch from the hinge axis
Data Source
AI summary
A cargo screen structure may include a housing mounted at an upper portion of a vehicle luggage room in a horizontal direction, a shaft rotatably provided in the housing, a screen provided on an outer peripheral surface of the shaft and wound and unwound from the housing, and a switch provided in the housing and set to be turned on/off according to a winding amount of the screen around the outer peripheral surface of the shaft.