Motor Vehicle Door Lock Emergency Actuation via 3D Slot
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Solution Overview
Problem
Existing motor vehicle locks with coaxial arrangements of securing levers lack simple and reliable emergency actuation solutions that can accommodate the coaxial arrangement while ensuring proper manual actuation.
Innovation Solution
The motor vehicle lock incorporates a first securing lever with a spring for positioning, a guide groove with a stop wall and a spring wall, and a limit stop for the emergency actuation element, allowing for stable and reproducible positioning and emergency actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a coaxial arrangement of securing levers is implemented to achieve compact design, then device complexity is reduced and space is saved, but emergency actuation becomes difficult and unreliable
Solution Approach 1:
The patent transitions from planar 2D operation to 3D spatial operation by introducing an elongated槽 (slot) that extends in a direction offset from the lever axis. The emergency actuation element operates in this third dimension, allowing manual actuation to occur along the elongated槽 rather than requiring direct manipulation of the coaxial lever arrangement, thus resolving the conflict between compact coaxial design and emergency accessibility
Solution Approach 2:
The emergency actuation element serves as an intermediary mechanism that translates manual operation into lever actuation. Rather than directly manipulating the securing lever, the user operates the emergency actuation element which then transmits force through the elongated槽 to move the lever, providing a reliable manual actuation path that accommodates the compact coaxial arrangement
2Reliability
If multiple dedicated motor drives are used for each securing lever to ensure reliable actuation, then reliability is improved, but device complexity and number of components increase
Solution Approach 1:
The patent implements a universal actuation approach where a single motor drive can actuate multiple securing levers through the shared elongated槽 mechanism. The emergency actuation element and elongated槽 serve multiple functions: they enable manual emergency actuation, accommodate motorized actuation, and work with the spring positioning system, reducing the need for dedicated motor drives for each lever while maintaining reliability
3Reliability
If spring positioning is added to the securing lever to ensure stable end positions, then reliability of positioning is improved, but device complexity increases
Solution Approach 1:
The patent merges the spring positioning function with the existing lever and elongated槽 structure. The spring is integrated into the assembly, working in conjunction with the lever's movement along the elongated槽 to provide positioning at end positions. This combination approach provides reliable positioning without adding completely separate positioning mechanisms, thereby limiting the increase in device complexity
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 configuration provides a simple, functionally correct emergency actuation system that ensures the securing lever can assume stable end positions reliably, both during motorized operation and emergency situations, while maintaining a compact design.
Implementation Method 1
The securing lever (5) has a spring (5a) for positioning
Data Source
AI summary
The invention relates to a motor vehicle lock, in particular a motor vehicle door lock, which is equipped with a locking mechanism (1, 2) composed, essentially, of a rotary latch (1) and a pawl (2). Furthermore, a securing device (5, 6, 7, 8) and and an emergency actuation element (9, 10, 11) for the securing device are realized. The securing device (5, 6, 7, 8) has at least one securing lever (5), which can be acted upon both by a first motor drive (7) and by an emergency actuation lever (10) as part of the emergency actuation element (9, 10, 11). According to the invention, the first securing lever (5) has a spring (5a) for positioning the first securing lever.