Flush Door Handle Displacement Sensing for Buttonless Opening
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Solution Overview
Problem
Existing motor vehicle door handles with flush-mounted mechanisms are ergonomically and aesthetically suboptimal, often requiring complex motorization and visible buttons, and lack efficient detection mechanisms for user input.
Innovation Solution
A capacitive, inductive, optical, or pneumatic detection system that senses handle displacement of less than 20% or 10% of the total stroke, allowing for ergonomic and aesthetic improvements by eliminating visible buttons and simplifying the handle's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a flush-mounted handle is used for aesthetic and aerodynamic reasons, then the appearance and aerodynamics are improved, but the ergonomics and visibility of the grip are worsened
Solution Approach 1:
The handle is designed to be extendable from a flush-mounted retracted position to an extended grasping position. This dynamic transformation allows the handle to adapt its shape: flush with the door surface when not in use for aesthetics and aerodynamics, and extended outward when needed for ergonomic grasping and visibility.
2Ease of operation
If motorized pivoting is implemented for the handle, then the ease of operation is improved, but the device complexity and cost are worsened
Solution Approach 1:
The patent replaces complex motorized pivoting mechanisms with a simpler spring-based elastic mechanism. The spring provides the necessary force to extend the handle automatically when a user applies pressure, eliminating the need for motors, capacitive buttons, or electronic controls while maintaining ease of operation.
3Adaptability or versatility
If capacitive buttons or switches are added to the handle, then the control functionality is improved, but the construction complexity and cost are worsened
Solution Approach 1:
The patent extracts and eliminates the complex capacitive buttons or switches from the handle design. Instead, it uses the natural mechanical action of the spring-loaded handle extension as the control input, which is detected by a simple sensor that monitors the handle's position or movement, thereby maintaining control functionality while dramatically reducing construction complexity.
4Extent of automation
If a limit switch is used to detect handle position, then the control signal generation is improved, but the detection precision and reliability are worsened
Solution Approach 1:
The patent replaces the mechanical limit switch with a sensor that detects the handle's position or movement through non-contact means (such as optical, capacitive, or magnetic sensing). This substitution improves detection precision by providing continuous or near-continuous monitoring of the handle's state rather than relying on a binary on/off signal from a mechanical switch, thereby enhancing reliability.
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
The solution enhances user experience by reducing complexity and cost while ensuring reliable door operation through precise handle detection, improving ergonomics and aesthetics.
Implementation Method 1
the detection means are of the capacitive, inductive, optical and/or pneumatic type, configured to detect a displacement stroke of the handle corresponding to less than 20%, preferably less than 10%, of a total stroke of said handle
Implementation Method 2
the detection means are of the capacitive, inductive, optical and/or pneumatic type, configured to detect a displacement stroke of the handle
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to an external opening control for an openable body section of a motor vehicle, comprising a housing (10), a handle (8) mounted movably on the housing (10) between a deployed position and a retracted position with a view to being recessed in the openable body section, and means for controlling the opening of the openable body section in response to pulling on the handle (8) in deployed position. The opening control additionally comprises means (14) for detecting the movement of the handle relative to the housing (10), resulting from pressure on said handle (8), said means (14) being configured to lock the openable body section and/or to move the handle.