Concealed Door Handle Microswitch Position Detection
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Solution Overview
Problem
Concealed door handles in vehicles face challenges in accurately detecting small angle changes due to limited detection accuracy with Hall sensors and increased complexity and cost, and existing solutions with microswitches require additional components and wiring, leading to higher costs and structural complexity.
Innovation Solution
A concealed door handle design incorporating deployment and retraction microswitches on the handle base to detect and communicate the handle's position to the vehicle control module, simplifying the structure and reducing components while maintaining functional accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a Hall sensor is used to monitor the rotation angle of the concealed handle, then the detection function is provided, but the detection accuracy is insufficient for small angle changes (≤15°) and the device complexity and cost increase due to additional magnetic rings, PCB circuits, and rotation angle amplification mechanisms
Solution Approach 1:
The patent extracts and eliminates the complex rotation angle amplification mechanism, magnetic ring, and PCB circuit from the system. Instead, it uses a simple microswitch that directly detects the handle's deployed and retracted positions through mechanical contact, achieving accurate detection of small angle changes (≤15°) without unnecessary components.
Solution Approach 2:
The patent replaces the expensive Hall sensor and magnetic ring assembly with a simple, low-cost microswitch. The microswitch provides sufficient detection capability for the application at a fraction of the cost, eliminating the need for complex signal processing circuits and angle amplification mechanisms.
2Measurement precision
If additional rotation angle amplification mechanism is designed to amplify small angle changes, then the detection accuracy is improved, but the device complexity and cost increase due to additional gears and mechanisms
Solution Approach 1:
The patent removes the rotation angle amplification mechanism (gears, linkages) entirely from the design. The microswitch is positioned to directly detect the handle's position changes, eliminating the need for mechanical angle amplification and simplifying the manufacturing process.
3Reliability
If multiple independent microswitches are used to detect handle positions, then the detection function is provided, but the device complexity and cost increase due to additional microswitches and wiring harnesses
Solution Approach 1:
The patent merges the detection of multiple handle positions (deployed and retracted) into a single microswitch system. The microswitch detects position changes through its triggered and untriggered states, eliminating the need for multiple independent microswitches and reducing wiring complexity while maintaining detection reliability.
Data Source
AI summary
The invention relates to a concealed door handle and a vehicle. The concealed door handle comprises: a handle body; a handle base fixed in a body of a vehicle, the handle body being concealed in the handle base, and the handle body being rotatably connected to the handle base; and a deployment microswitch arranged on the handle base and configured to detect a deployed position of the handle body and to maintain communication with a vehicle control module, wherein when the deployment microswitch jumps from a triggered state into an untriggered state, the deployment microswitch sends an input signal for unlocking an electronic lock to the vehicle control module. The concealed door handle of the invention has a simple structure and low costs, and a signal source can be arranged in a limited structural space.