Vehicle Roof Panel Lock Slide Mechanism

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Solution Overview

Problem

Existing vehicle roofs with removable panels require additional securing mechanisms like screws and clamping elements, which can be cumbersome and inefficient for detachment and reattachment.

Innovation Solution

A vehicle roof system featuring lock elements on either side of the vertical longitudinal center plane, driven by a shared electric motor through compression-proof cables, allowing the roof panel to be secured and detached without additional securing elements by moving lock slides between locking and unlocking positions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If screws and clamping elements are used to secure the roof panel, then the roof panel can be retained on the solid roof portion, but the detachment and reattachment process becomes cumbersome and inefficient

Engineering Contradiction:
Improvesecuring reliabilityVSAvoiddetachment ease
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The patent replaces the traditional mechanical fastening system (screws and clamping elements) with a lock element and lock slide mechanism. The lock element features a ramp surface that interacts with the lock slide to provide automatic engagement and retention, eliminating the need for manual screw tightening and clamping operations. This substitution maintains securing reliability while dramatically improving ease of detachment and reattachment.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the operational parameters of the fastening system by introducing a ramp surface that converts linear motion of the lock slide into automatic locking/unlocking action. When the lock slide moves along the ramp surface, it automatically engages or disengages the lock element, changing the fastening process from a manual multi-step operation to a single-motion automatic system that maintains reliability while improving operational ease.

Inventive Principle:
Principle #35Parameter changes

2Device complexity

If a shared electric motor drives both lock slides through compression-proof cables, then the device complexity is reduced, but the control precision and synchronization of lock slides may be compromised

Engineering Contradiction:
Improvedrive system complexityVSAvoidlock slide positioning precision
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The patent merges the drive systems for both lock slides into a single shared electric motor, reducing device complexity by eliminating redundant motors and control systems. The motor drives both lock slides simultaneously through compression-proof cables, providing synchronized operation while maintaining positioning precision through the rigid cable construction and guide rail constraints.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The patent introduces compression-proof cables as intermediary elements that transmit force from the shared electric motor to both lock slides. These cables act as flexible yet rigid transmission medium that maintains precise force transmission and positioning control despite the distributed nature of the drive system, ensuring synchronized and precise movement of both lock slides from a single motor source.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Ease of operation

If lock slides are guided in a body-attached guide rail, then the displacement control is improved, but the device complexity increases

Engineering Contradiction:
Improvedisplacement controlVSAvoidguide rail structure complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The guide rail serves multiple functions simultaneously: it provides structural support for the lock slide mechanism, defines the precise displacement path for the lock slides, and acts as a positioning reference for achieving accurate locking and unlocking positions. This multi-functionality improves displacement control while minimizing the addition of separate control components, thereby limiting the increase in device complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS11241944B2Vehicle roof having a roof panel
Publication Date: 2022.02.08 WEBASTO AG
  • US11241944B2 patent drawing
  • US11241944B2 patent drawing
  • US11241944B2 patent drawing

AI summary

A vehicle roof having a solid roof portion is provided, which is attached to the vehicle body and which delimits a roof opening, and at least one removable roof panel which covers the roof opening when in a closed position and which is detached from the solid roof portion when in an open position, the roof opening thus being uncovered, wherein the roof panel has at least one lock element on either side of a vertical longitudinal center plane of the roof, each lock element interacting with a respective lock slide which can be moved between at least one locking position, in which it retains the roof panel on the solid roof portion and the in roof opening is closed by the roof panel, and an unlocking position, in which the roof panel can be detached from the solid roof portion.