Vehicle Headlamp High Low Beam Switching Mechanism
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Solution Overview
Problem
Conventional high/low beam switching devices for vehicle headlamps suffer from inadequate performance in switching between high and low beam illumination patterns.
Innovation Solution
A high/low beam switching device comprising a fixing plate with three zones, a solenoid device with a shaft and tongue, and a shielding member with a reflective concave surface, where the shielding member is pivotally connected and urged by a coil spring to cover or uncover the middle space, allowing for high and low beam illumination patterns based on solenoid energization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional switching device with solenoid device is installed between the base portion and the lens portion of the headlamp, then the headlamp can switch between high beam illumination and low beam illumination, but the performance is not good
Solution Approach 1:
The opening in the fixing plate is divided into three distinct zones (upper space, middle space, lower space), and the shielding member is designed with two separate L-shaped arms that can independently control light blocking in different regions, enabling precise beam pattern control
Solution Approach 2:
The shielding member is configured with a reflective concave surface that reflects and redirects light rays, improving illumination performance by curving the light path rather than simply blocking it, thus enhancing both high beam and low beam patterns
2Ease of operation
If the shielding member is pivotally connected to the fixing plate and urged by a coil spring, then the shielding member can be turned away from the middle space to provide high beam illumination pattern, but the switching precision is insufficient
Solution Approach 1:
Different zones of the opening (upper, middle, lower spaces) are assigned different functions: the middle space is blocked for low beam operation while upper and lower spaces remain open, and the reflective concave surface on the shielding member further modifies light distribution in specific regions to achieve precise beam patterns
Solution Approach 2:
The T-shaped link member acts as an intermediary between the solenoid device and the shielding member, with its slot engaged with the shaft's neck portion to translate solenoid actuation into precise shielding member rotation, improving switching control precision
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
Enhances the performance of headlamp illumination by effectively switching between high and low beam patterns, improving light distribution and intensity through the use of a reflective concave surface on the shielding member.
Implementation Method 1
the coil spring can be fitted around the shaft between the solenoid device and the tongue, so that the shielding member can be urged by the coil spring to cover the middle space
Implementation Method 2
The shielding member can be configured with a reflective concave surface to increase the performance of high beam illumination
Implementation Method 3
The solenoid device is provided with a shaft inserted through the lower space of the fixing plate... When the solenoid device is energized, the shielding member can be turned away from the middle space
Data Source
AI summary
A high/low beam switching device generally includes a fixing plate, a solenoid device, a shielding member, and a coil spring. The fixing plate defines an opening which is divided into three zones including an upper space, a middle space, and a lower space. The solenoid device is horizontally disposed in a frame fixed on a shelf extending from the fixing plate. The shielding member, which can cover the middle space of the fixing plate, is pivotally connected to the fixing plate. The solenoid device when being energized can turn the shielding member to uncover the middle space, so that a high beam illumination pattern can be provided. When the solenoid device is de-energized, the shielding member can be turned back to the fixing plate to cover the middle space, so that a low beam illumination pattern can be provided. Also, the present invention provides a headlamp including the switching device.