Vehicle Door Lock Lever Assembly for Panic State Operation
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Solution Overview
Problem
Conventional door lock apparatuses face inefficiencies in assembly and manufacturing due to complex processes, particularly when assembling the lock operation lever, which can lead to unfavorable operations during 'panic states' caused by simultaneous door handle and lock-unlock member operations.
Innovation Solution
A door lock apparatus with a lock operation lever configured as a sub-assembly containing an active lever, a sub lever, and a biasing member, where the sub lever operates integrally with the active lever when the link member is switched to the lock position and cooperates via a biasing member when switched to the unlock position, enhancing assembly efficiency and simplifying manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the lock operation lever is assembled as separate components (active lever, sub lever, biasing member), then the assembly process becomes complex and time-consuming, but the manufacturing precision can be maintained
Solution Approach 1:
The patent combines the active lever, sub lever, and biasing member into a pre-assembled unit called the lock operation lever. This integration allows the entire assembly to be installed as one component, significantly improving assembly efficiency while maintaining manufacturing precision through standardized production of the integrated unit.
2Reliability
If the link member is operated during simultaneous door handle and lock-unlock member operations, then a panic state occurs disabling door opening, but the door lock condition is maintained
Solution Approach 1:
The patent implements dynamic engagement between the link member and lift lever through the sub lever mechanism. The engagement state changes based on the operational context: engaged during normal locking operations to maintain security, and disengaged during panic states to allow door opening. This dynamic behavior resolves the contradiction between maintaining lock reliability and enabling ease of operation when needed.
3Productivity
If the sub lever operates integrally with the active lever during lock position switching, then the assembly efficiency is improved, but the operational flexibility during panic states must be maintained
Solution Approach 1:
The patent segments the operational functions within the integrated lock operation lever assembly. The active lever and sub lever are manufactured as one piece, improving manufacturing efficiency, but the sub lever is designed with independent engagement capability with the link member. This segmentation of function within structural integration allows the assembly to maintain operational adaptability during panic states while benefiting from manufacturing efficiency.
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 allows for easier assembly of the lock operation lever and simplifies the manufacturing process, enabling smooth transitions from a locked to an unlocked state even during 'panic states' caused by simultaneous operations, thereby improving operational efficiency and reducing manufacturing costs.
Implementation Method 1
a biasing member between the active lever and the sub lever
Data Source
AI summary
A door lock apparatus includes: a link member interposed between a latch mechanism and an open lever and selectively operated between an unlock position and a lock position, the unlock position in which an operation of the open lever is transmitted to the latch mechanism, and the lock position in which the operation is not transmitted to the latch mechanism; and a lock operation lever including an active lever and a sub lever, the sub lever configured to operate integrally with the active lever when the link member is switched to the lock position and to cooperate with the active lever via a biasing member when the link member is switched to the unlock position. The lock operation lever is an assembly containing the active lever, the sub lever and the biasing member.