Motor Vehicle Locking Device Safety Lever Mechanism
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Solution Overview
Problem
Existing motor vehicle locking devices with two-stroke actuation lack a convincing approach to combine this actuation with a safety function, leading to confusion among users when a locking function or unit is implemented.
Innovation Solution
The introduction of an additional safety lever that, in its 'secured' position, prevents the release lever from moving during the second stroke of the actuating lever, and in its 'unlocked' position, allows it to move, ensuring the two-stroke actuation is maintained even with additional locking functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking function or unit is added to the motor vehicle locking device, then the security function is improved, but the operation becomes confusing for users due to the additional components
Solution Approach 1:
The safety lever acts as an intermediary component that mediates between the actuating lever and the release lever. It controls whether the release lever can move during the second stroke, thereby enabling the locking function while maintaining the familiar two-stroke operation sequence. The safety lever is positioned to interact with both levers, allowing it to enable or disable the release lever's movement without changing the overall operation flow.
2Reliability
If the release lever is prevented from moving during the second stroke to implement a locking function, then the security function is improved, but the device complexity increases
Solution Approach 1:
The safety lever is designed to perform multiple functions: it controls the locking function, interacts with the actuating lever during the first stroke, and controls the release lever during the second stroke. By making this single component multi-functional, the patent reduces the need for additional separate mechanisms, thereby limiting the increase in device complexity while achieving the locking function.
3Ease of operation
If the accumulator lever stores the first stroke to enable second stroke action, then the two-stroke actuation is achieved, but the device complexity increases
Solution Approach 1:
The accumulator lever is merged with the existing lever system, sharing the same axis and space as the actuating and release levers. Instead of being a separate, independent mechanism, the accumulator lever is integrated into the lever chain, combining the storage function with the existing structural elements. This merging approach enables the two-stroke actuation while minimizing the increase in device complexity.
Data Source
AI summary
A motor vehicle locking device is equipped with a coupling arrangement consisting essentially of an actuating lever and a release lever that can be coupled releasably thereto. The actuating lever and the release lever can be coupled to one another starting from an uncoupled basic position by a two-stroke actuation of the actuating lever. An accumulator lever storing the first stroke of the operating lever is additionally provided so that, during its second stroke, the operating lever can act upon the release lever that follows the accumulator lever. According to the invention, a safety lever is provided as a complement, which suppresses in its “secured” position a subsequent movement of the release lever during the second stroke of the actuating lever and permits said movement in its “unsecured” position.