Dual-Sided Adjustable Fastener for Flush Door Handle Alignment
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Solution Overview
Problem
Existing door handle adjustment mechanisms, such as set screws, often result in over-driving during installation, causing damage and preventing proper flush setting due to a lack of precise control over the flush orientation relative to surrounding components.
Innovation Solution
A dual-sided adjustable male fastener system is introduced, featuring a threaded shank with a proximal head and distal nipple, allowing initial internal installation and final exterior adjustment to achieve a flush orientation, with a biasing spring and annular base for precise depth control and prevention of over-driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a set screw is used to establish the flush position, then the handle can be positioned relative to surrounding components, but the screw may be over-driven causing damage and preventing proper flush setting
Solution Approach 1:
The biasing spring is pre-installed in the handle assembly before final installation, creating a preliminary protective action that will engage with the fastener head to prevent over-driving during subsequent installation steps
Solution Approach 2:
The biasing spring acts as a cushioning element positioned between the fastener head and the handle structure, absorbing excess force if the fastener is over-driven and preventing damage to the handle assembly
2Ease of operation
If a set screw is used for depth control, then the handle depth can be adjusted, but the adjustment mechanism lacks precision control over flush orientation
Solution Approach 1:
The biasing spring provides tactile and mechanical feedback during the fastening process, indicating when the optimal flush position is reached through the engagement point with the fastener head, allowing precise orientation control
3Adaptability or versatility
If the adjustment feature accommodates variations in surrounding components, then greater versatility is achieved, but the device complexity increases
Solution Approach 1:
The dual-sided adjustable male fastener with integrated biasing spring serves multiple functions: it provides threaded engagement, depth control, damage prevention, and flush orientation adjustment, allowing a single component to handle various component variations without requiring multiple specialized parts
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
This solution enables precise adjustment and prevents damage by allowing fine-tuned depth setting, accommodating variations in surrounding components, and ensuring a flush, functional door handle assembly without over-driving issues.
Implementation Method 1
a biasing spring positioned in overlying relation to the support plate such that the biasing spring is compressed between the outer support component and an interior surface of the surrounding mating component
Data Source
AI summary
A vehicle door handle assembly incorporating a dual sided adjustable male fastener. The dual sided adjustable male fastener is adapted to be installed to an initial predefined preliminary position from the inside of the structure and then adjusted from the exterior at the point of final assembly to establish a flush orientation of the handle relative to surrounding components.