Vehicle Lamp Radar Mounting Structure for Vibration Stability
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Solution Overview
Problem
The existing vehicle lighting fixtures with a radar unit attached in a cantilevered manner experience significant vibrations due to vehicle movement, leading to substantial changes in the detection area of the radar unit.
Innovation Solution
A vehicle lighting fixture design that includes a bracket fixed to both the outer lens and the housing, with the radar unit detachably attached to the bracket, preventing cantilevered extension and reducing vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the radar unit is attached to a plate-like part extending downward from the lower part of the lighting-fixture housing in a cantilevered manner, then the radar unit can be easily installed and accessed, but the plate-like part and radar unit widely vibrate during vehicle traveling, significantly changing the detection area
Solution Approach 1:
The patent divides the mounting structure into separate components: a bracket fixed to the housing, and the radar unit detachably mounted on the bracket. This segmentation allows the bracket to provide stable support while enabling easy installation and removal of the radar unit, resolving the contradiction between ease of operation and vibration stability.
Solution Approach 2:
The bracket serves as an intermediary component between the housing and the radar unit. It is firmly fixed to the housing to provide stability, while the radar unit is detachably attached to the bracket, allowing easy installation and access. This intermediary structure eliminates the cantilevered configuration that caused excessive vibration.
2Device complexity
If the radar unit is attached in a cantilevered manner, then the structure is simple and compact, but the detection area changes significantly due to vibrations acting with the base as fulcrum
Solution Approach 1:
The mounting structure is segmented into the bracket (fixed to housing) and radar unit (detachably mounted), eliminating the cantilevered design. This segmentation maintains structural compactness while ensuring the radar unit remains stable during vehicle motion, preserving detection precision.
Solution Approach 2:
Instead of attaching the radar unit directly to the housing in a cantilevered manner, the patent inverts the attachment approach: the bracket is fixed to the housing, and the radar unit is attached to the bracket. This inversion eliminates the fulcrum effect at the base, preventing excessive vibration and maintaining detection area consistency.
Data Source
AI summary
A vehicle lighting fixture comprising a housing, an outer lens attached to the housing and forming a first space between the outer lens and the housing, and a lighting-fixture unit arranged in the first space, wherein the outer lens includes a light-transmitting part through which light emitted from the lighting-fixture unit passes and a recess arranged below the light-transmitting part, wherein the vehicle lighting fixture further comprising: a radar cover arranged in a state of covering the recess and forming a second space between the radar cover and the recess; a bracket arranged in the second space; a radar unit arranged in the second space in a state of detachably being fixed to the bracket; a first fixing part fixing one end of the bracket to the outer lens, and a second fixing part fixing the other end of the bracket to the housing.