Motor Vehicle Door Lock Actuating Lever Chain
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Solution Overview
Problem
Current motor vehicle door locks lack a reliable mechanism for remote electrical opening and mechanical emergency opening, particularly in scenarios like crashes where manual operation is not feasible.
Innovation Solution
The actuating lever chain is designed to maintain a 'locked' position unless an emergency opening or crash occurs, at which point it transitions to 'unlocked', allowing mechanical opening by rescue personnel, and an additional drive ensures the generation of an opening signal for electrically opening the locking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the actuating lever chain is kept in the 'locked' position to prevent unauthorized opening, then security is improved, but the ability to open the door mechanically in normal conditions is worsened
Solution Approach 1:
The actuating lever chain is designed to be dynamically switchable between 'locked' and 'unlocked' positions. In normal operation, it remains in the 'locked' position to prevent mechanical opening. In emergency situations, it can be transferred to the 'unlocked' position to enable mechanical opening by rescue personnel, thus resolving the contradiction between security and emergency accessibility.
Solution Approach 2:
The system changes the operational state parameter of the actuating lever chain from 'locked' to 'unlocked' based on the situation. This parameter change allows the same mechanical component to serve dual purposes: maintaining security during normal operation and enabling emergency access when needed.
2Ease of operation
If remote electrical opening is implemented without mechanical connection, then convenience is improved, but reliability in emergency situations is worsened
Solution Approach 1:
The actuating lever chain serves as an intermediary mechanism that can operate in two modes: mechanically connected for emergency opening and mechanically disconnected for remote electrical opening. This intermediary component allows the system to achieve both remote convenience and emergency reliability without compromising either function.
3Ease of operation
If the actuating lever chain is mechanically connected to the locking mechanism, then mechanical opening is enabled, but unauthorized mechanical opening becomes possible
Solution Approach 1:
The system applies preliminary anti-action by keeping the actuating lever chain in the 'locked' position during normal operation, which prevents any mechanical opening attempts. The mechanical connection to the locking mechanism is effectively blocked in advance, thwarting unauthorized opening before it can occur. In emergencies, this preliminary blocking is temporarily removed to allow legitimate mechanical opening.
Data Source
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AI summary
The object of the invention is a motor vehicle door lock, comprising a locking mechanism, an actuating lever chain (12, 13, 14) and a drive (4, 5) for electrically opening the locking mechanism. According to the invention, an additional drive (7, 8) is provided, which optionally transfers the actuating lever chain (12, 13, 14) in its "locked" position and only then generates an opening signal for the drive (4, 5) for electrically opening the locking mechanism.