Vehicle Door Handle Push Switch Button Hinge Mechanism
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Solution Overview
Problem
Existing push switches in vehicle door handles suffer from issues such as inclination, sloping, jamming, and difficulty in operation due to moisture, along with aesthetic problems caused by misalignment and uneven force distribution, particularly in smart-key systems.
Innovation Solution
A push switch design featuring a button hinged and supported by both sides within a grip cover, utilizing a hinge-coupling structure with circular hinges and 'L'-shaped coupling units to guide and secure the button, reducing inclination and jamming, and employing elastic deformation of bending portions for controlled operating force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the guide rib is made sufficiently long to prevent button inclination, then button stability is improved, but the device complexity and manufacturing difficulty increase due to space constraints in the handle
Solution Approach 1:
The guide structure is divided into multiple segments: a guide rib on the grip cover, additional guide ribs on the button itself, and positioning protrusions on the tact switch. This segmentation allows each component to contribute to button stability without requiring any single element to be excessively long or complex.
Solution Approach 2:
The guide ribs are integrated directly onto the button body, and the positioning protrusions are formed on the tact switch housing that receives the button. This nesting approach allows the guide structures to be incorporated into existing components without adding separate external guide mechanisms, thereby reducing overall device complexity.
2Manufacturing precision
If the gap between the button and the rim of the hole is reduced to prevent button movement, then button positioning accuracy is improved, but the ease of operation deteriorates when moisture enters and becomes frozen
Solution Approach 1:
Different regions of the button assembly have different gap characteristics. The guide ribs and positioning protrusions provide localized guidance and positioning where precision is needed, while the overall button cavity maintains sufficient clearance to accommodate thermal expansion and contraction in frozen conditions. This local differentiation of gap sizes resolves the contradiction between positioning accuracy and operational ease.
3Ease of operation
If the overlap between the pressing protrusion and the rubber seal is increased to enhance button sensitivity, then operational sensitivity is improved, but the reliability deteriorates due to rubber seal tearing
Solution Approach 1:
The design optimizes the overlap parameter between the pressing protrusion and rubber seal to a specific range that provides sufficient sensitivity while preventing excessive stress on the rubber. Additionally, the rubber seal's physical parameters (thickness, durometer, cross-section shape) are specifically designed to accommodate the required overlap without tearing, thus resolving the contradiction between sensitivity and durability.
4Ease of operation
If the button is allowed to have movement freedom for easy operation, then ease of operation is improved, but the appearance deteriorates due to misalignment and uneven force distribution
Solution Approach 1:
The guide ribs and positioning protrusions are asymmetrically positioned to provide guidance in the pressing direction while allowing minimal lateral movement. This asymmetric guidance structure ensures the button remains properly aligned during operation while still permitting the necessary freedom of movement for ease of operation, thus resolving the contradiction between operability and appearance.
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 design effectively minimizes leaning, sloping, and jamming, enhances operational ease, and maintains a clean appearance by stabilizing the button's position and force distribution, even in conditions affected by frozen moisture.
Implementation Method 1
employing elastic deformation of bending portions for controlled operating force
Data Source
AI summary
A push switch of an outside handle of a door having a button installed inside a grip cover, wherein the button is attached to the inner surface of the grip cover through a support extending from a side of the button, and a tact switch pressed when the button is pushed.