Vehicle Outside Handle Interference Lever Crash Locking
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Solution Overview
Problem
Existing outside handle structures for vehicles face limitations in preventing door opening during side crashes due to inertial forces, including weight increase, structural deficiencies, and reliability issues with existing door opening preventing devices.
Innovation Solution
A new outside handle apparatus incorporating a handle lever and interference lever with interlocking mechanisms, utilizing connection and return springs to control the rotation of the handle lever and prevent door opening during side crashes, eliminating the need for a balance weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a balance weight is mounted on the handle lever to offset inertial force, then door opening prevention is improved, but weight increase and structural complexity occur
Solution Approach 1:
The patent converts the harmful inertial force that causes door opening during side crashes into a beneficial locking mechanism. When inertial force acts on the handle grip during a crash, it automatically triggers the interference lever to engage with the handle lever, preventing door opening. The same inertial force that was previously problematic is now utilized as the activation mechanism for the safety feature.
Solution Approach 2:
The patent divides the door opening prevention function into two separate components: the handle lever (normal operation) and the interference lever (crash prevention). This segmentation allows each component to be optimized for its specific function without requiring a heavy balance weight, reducing overall weight while maintaining reliability.
2Reliability
If a balance weight is mounted on the handle lever to offset inertial force, then door opening prevention is improved, but structural complexity and layout deficiencies occur
Solution Approach 1:
The patent merges the crash prevention function into the existing handle lever structure by adding the interference lever that works in conjunction with it. Rather than adding a separate balance weight mechanism, the interference lever is integrated into the same assembly, sharing space and structural support, thereby reducing overall complexity.
Solution Approach 2:
The interference lever acts as an intermediary component that mediates between the handle grip and the door latch system during crash conditions. It translates the inertial force from the handle grip into a locking action without requiring complex linkage mechanisms, simplifying the overall structure.
3Reliability
If typical door opening preventing devices are used, then door opening prevention is achieved, but structural limitations and reliability issues occur due to multiple linkage steps
Solution Approach 1:
The patent extracts and eliminates the complex multi-step linkage mechanisms from typical door opening preventing devices. By using the interference lever that directly engages with the handle lever through a simple interlocking action, it removes unnecessary intermediate linkage components, reducing structural complexity while maintaining reliability.
4Ease of operation
If the handle lever is designed to rotate freely for normal operation, then ease of operation is improved, but door opening during crash cannot be prevented
Solution Approach 1:
The patent implements a dynamic system where the interference lever can freely rotate during normal operation (maintaining ease of use) but automatically engages to lock the handle lever during crash conditions. The system transitions from a static locked state to a dynamic operational state and back to a locked state based on the forces applied, providing both ease of operation and crash prevention.
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 effectively prevents door opening during side crashes by maximizing the utilization of inertial forces, reducing weight, and enhancing design flexibility, while meeting crash regulations and safety standards.
Implementation Method 1
a connection spring, one end of which is fixed to the handle lever and the other end of which is locked and supported by the interference lever
Data Source
AI summary
An outside handle apparatus for a vehicle may include a handle grip including a first locking part, a handle base, a handle lever having a second locking part and rotatably supported by an axis of the handle lever at one side of the handle base and moving in linkage with the handle grip while the second locking part formed at an lower end of the handle lever is locked with the first locking part of the handle grip, and an interference lever pivotally coupled to the handle base at one side of the handle base, wherein the interference lever rotates in linkage with a rotation of the handle lever at ordinary times, and is interlocked with the handle lever due to a rotation of the handle lever upon crash to control the rotation of the handle lever.