Motor Vehicle Door Lock Clutch Lever Segmentation
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Solution Overview
Problem
Existing motor vehicle door locks have complex and expansive constructions, leading to difficult assembly and installation, particularly due to the use of rotary knobs and transmission rods, which complicates the attachment and operation of child safety mechanisms.
Innovation Solution
A motor vehicle door lock design featuring a clutch lever that assumes retracted and extended positions relative to the actuating lever, with a stop arm that interacts with the release lever depending on the securing element's position, allowing for simplified assembly and flexible attachment, utilizing a connecting lever and a single spring for mechanical operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotary knob and transmission rod are used for the child safety mechanism, then the locking function is reliable, but the assembly becomes complex and installation becomes difficult
Solution Approach 1:
The transmission element is divided into two separate parts: a connecting lever and a clutch lever. The connecting lever is integrally formed with the actuating lever, while the clutch lever is a separate component that can be easily attached and detached. This segmentation simplifies the overall assembly structure and makes installation straightforward, while maintaining the reliable locking function through the coordinated operation of these divided components.
2Reliability
If a rotary knob and transmission rod are used for the child safety mechanism, then the locking function is reliable, but the installation flexibility is reduced
Solution Approach 1:
By dividing the transmission element into separable parts (connecting lever and clutch lever), the system gains installation flexibility. The clutch lever can be independently positioned and attached to different locations on the actuating lever, allowing adaptation to various door lock configurations and installation scenarios while preserving the reliable child safety locking function.
3Ease of operation
If additional external springs are added to the mechanism, then the mechanical operation is enhanced, but the component count increases
Solution Approach 1:
The spring element is integrated directly into the clutch lever component, merging the spring function with the clutch lever structure. This eliminates the need for separate external springs, reducing the overall component count while maintaining smooth mechanical operation. The spring-loaded mechanism within the clutch lever provides the necessary mechanical assistance for engaging and disengaging the locking mechanism.
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 design simplifies assembly, reduces component count, and enhances flexibility in installation options while maintaining effective child safety functionality, allowing for easy differentiation between secured and unsecured positions without additional external springs.
Implementation Method 1
a two-armed lever with a coupling arm and a stop arm, the connecting lever also moving the coupling lever into its engaged position with the release lever or its disengaged position with the release lever
Implementation Method 2
utilizing a connecting lever and a single spring for mechanical operation
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
The invention relates to a motor vehicle door lock with a locking mechanism, a release lever (1) operating on the locking mechanism, at least one actuating lever (2), and with a securing element (6) which, with the interconnection of a transmission member (7, 8), interacts with the actuating lever (2) and, depending on the position of the securing element (6), brings the actuating lever (2) into engagement or out of engagement with the release lever (1), wherein the transmission member (7, 8) is designed in two parts, with a connecting lever (7) and a coupling lever (8) which is mounted on the actuating lever (2) so as to be rotatable about an axis (16), and, depending on the position of the securing element (6), the connecting lever (7) transfers the coupling lever (8) into the engagement position thereof with the release lever (1) or into the out of engagement position thereof with the release lever (1).