Motor Vehicle Door Lock Spring Storage Lever Mechanism
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Solution Overview
Problem
The existing motor vehicle door lock mechanisms suffer from reduced functional reliability due to indifferent movements of the storage element, particularly when opening and closing, which can lead to uncontrolled pawl movements and design inefficiencies.
Innovation Solution
A motor vehicle door lock design where the storage element is maintained in contact with at least one lock component via a spring throughout all functional states, utilizing a rotatable storage lever with a spring leg and stop leg, ensuring the pawl is held in the raised position until the rotary latch is opened, and using a bistable toggle spring for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the storage element is made freely movable to allow flexible operation, then the ease of operation is improved, but the functional reliability deteriorates due to uncontrolled movements and noise
Solution Approach 1:
The spring acts as an intermediary element between the storage element and the lock components. It maintains continuous contact while allowing controlled movement, preventing uncontrolled movements and noise while preserving operational flexibility. The spring mediates the interaction, ensuring the storage element remains stable relative to lock components during all functional states.
2Reliability
If the storage element is fixed to prevent uncontrolled movements, then the functional reliability is improved, but the ease of operation deteriorates
Solution Approach 1:
The storage element is designed with dynamic characteristics through the spring connection. It can move controllably during operation but maintains stable contact with lock components. The spring allows the storage element to adapt its position dynamically while preserving reliability, avoiding both complete freedom of movement and rigid fixation.
3Reliability
If a complex mechanism is used to control storage element movements, then the functional reliability is improved, but the device complexity increases
Solution Approach 1:
The spring provides self-regulating functionality, automatically maintaining contact between the storage element and lock components without requiring external control mechanisms. The system uses the spring's inherent elastic properties to achieve reliable operation, eliminating the need for additional complex control systems while preserving functional reliability.
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 design enhances functional reliability by preventing uncontrolled movements and noise, while maintaining a structurally simple and cost-effective solution, ensuring the storage element consistently interacts with lock components, thus improving the overall performance of the locking mechanism.
Implementation Method 1
a storage element (13) which is acted upon by a spring (12) and which holds the pawl (4) in the raised position
Implementation Method 2
In order to achieve this bistability of the toggle spring, the spring is designed as a spiral spring
Data Source
Figure 1~3
Figure 4~6
Figure 7~9
AI summary
The door lock has a safety catch comprising a rotary latch (3) and a bolt (4). A drive (5) is provided for lifting the bolt. An accumulator unit (13) is impinged by a tilting spring (12), where the unit holds the bolt in the lifting position until the rotary latch is opened. The accumulator unit is held at a locking component by the spring during the opening of the latch. The unit is formed as a lever, which is rotatably supported around a stationary axis.