Manual Hidden Door Handle Structure for Low-Drag Vehicle Doors
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Solution Overview
Problem
Existing hidden retractable door handles in vehicles have complex structures, high costs, and increased weight due to the use of electric drives, which are not optimal for reducing wind resistance.
Innovation Solution
A hidden door handle design with a base, switch assembly, and rotatable handle assembly that operates manually between a hidden position and a trigger position to unlock the vehicle door, eliminating the need for electric drives and incorporating a reset mechanism for automatic return.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If electric drive is used to retract the handle, then the door handle can be hidden to reduce wind resistance, but the structure becomes complex, cost increases, and weight increases
Solution Approach 1:
The patent replaces the electric drive system with a purely mechanical operation system. The handle assembly is rotatably mounted to the base and can be manually rotated from a retracted position to an extended position, eliminating motors, sensors, and control electronics while achieving the same door opening function
Solution Approach 2:
The handle assembly transitions from a static electrically-driven retractable mechanism to a dynamic manually-rotatable mechanism. The rotatable connection allows the handle to move between retracted and extended positions through manual rotation, providing simplicity and reliability
2Object-affected harmful factors
If electric drive is used to retract the handle, then the door handle can be hidden to reduce wind resistance, but the cost increases
Solution Approach 1:
The patent employs simple, inexpensive mechanical components instead of expensive electronic systems. The rotatable handle assembly uses basic mechanical elements like pivot points and rotation joints that are far cheaper to manufacture than electric motors, control circuits, and associated electronics
Solution Approach 2:
By replacing the electric drive system with a manual rotation mechanism, the patent eliminates costly electronic components including motors, power consumption requirements, control electronics, and associated wiring, significantly reducing manufacturing costs
3Object-affected harmful factors
If electric drive is used to retract the handle, then the door handle can be hidden to reduce wind resistance, but the weight increases
Solution Approach 1:
The patent eliminates heavy electronic components (motors, batteries, control electronics) by using a lightweight manual rotation mechanism. The handle assembly weighs significantly less because it relies on simple mechanical rotation rather than powered actuation systems
Solution Approach 2:
The dynamic manual rotation system replaces static heavy electric components, allowing the handle to be lightweight yet functional. The rotatable connection enables movement without requiring heavy motors or power systems
4Object-affected harmful factors
If two independent spaces are provided for handle retraction and door opening, then the hidden door handle function is achieved, but the structure becomes complex
Solution Approach 1:
The patent merges the handle assembly's retraction function and door opening trigger function into a single integrated mechanism. The same rotatable handle assembly that retracts to reduce wind resistance also serves as the trigger when rotated to the first trigger position, eliminating the need for separate mechanisms
Solution Approach 2:
The handle assembly performs multiple functions: it can be rotated to a first trigger position to unlock the door, rotated to a second trigger position to directly open the door, and maintains a retracted position for aerodynamic efficiency. This multi-functionality eliminates the need for separate mechanisms
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 simplifies the structure, reduces costs, and decreases weight while maintaining functionality, offering manual operation and reduced wind resistance.
Implementation Method 1
a second trigger position to which the handle assembly is rotatable by the elastic component
Data Source
AI summary
A hidden door handle includes: a base including an opening; a switch assembly on the base, configured to unlock a vehicle door; and a handle assembly, rotatably mounted to the base, and having an initial position and a first trigger position to which the handle assembly is rotatable inwardly from the opening. In the initial position, the handle assembly is at the opening, and in the first trigger position, the handle assembly triggers the switch assembly to unlock the vehicle door.