Motor Vehicle Door Lock Lever System Sealing

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Solution Overview

Problem

Existing motor vehicle door lock assembly is complicated and expensive due to housing sealing issues, requiring large openings that allow water and dirt ingress, and necessitates special skills and tools for assembly.

Innovation Solution

A motor vehicle door lock design featuring a reinforcement tab on the housing cover with a rectangular reinforcement opening, allowing a pin to define the axis of rotation, which engages with aligned openings in the housing webs, enabling a detachable plug-in connection between levers while minimizing the housing opening, ensuring a sealed assembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a large opening is provided in the housing for inside locking components, then assembly is simplified, but housing sealing is compromised allowing water and dirt ingress

Engineering Contradiction:

Improveassembly simplicityVSAvoidwater and dirt ingress

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The housing is divided into multiple parts (first housing part, second housing part, cover) that are assembled together to form a sealed enclosure. The locking components are segmented into modular units that can be assembled within the sealed housing, eliminating the need for large external openings.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The locking components are nested within the sealed housing structure. The first and second locking components are positioned inside the housing formed by the housing parts and cover, allowing assembly to occur within the sealed environment rather than requiring large external access openings.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Adaptability or versatility

If a detachable connection with quick-release axle is used, then assembly flexibility is improved, but assembly complexity and cost increase due to special skills and tools required

Engineering Contradiction:

Improveassembly flexibilityVSAvoidassembly complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The locking components are directly connected to each other and to the housing through integrated mounting structures. The first locking component connects to the second locking component, which in turn connects to the housing, eliminating the need for separate quick-release axles and specialized assembly tools.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The housing parts and locking components are designed with self-aligning features and integrated mounting structures that allow assembly without specialized tools or skills. The components guide themselves into proper alignment during assembly, making the process straightforward and reducing complexity.

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP2588691B1Motor vehicle door lock

Publication Date: 2015.03.25 KIEKERT AG

Figure 1
Figure 2
Figure 3A~3C

AI summary

The invention relates to a motor vehicle door lock, with a locking mechanism (3, 4) and with a lever system (5, 8, 9) having at least two levers (5, 8) which are connected at an angle to each other and interact with each other, wherein the one lever (8) defining a fulcrum pin (14) is connected to a housing (1), and the fulcrum pin (14) reaches with a predetermined lateral play (a, b) through at least one reinforcing opening (24) in the housing (1).