Vehicle Door Control Plate Mechanism for Rear Door Locking

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Solution Overview

Problem

Existing mechanisms for preventing the opening of a rear motor vehicle door until the corresponding front door is open are complex and expensive to manufacture, posing a risk of damage if the user forces the operating member incorrectly.

Innovation Solution

A simplified mechanism with a pivotally mounted plate and disengaging means that immobilizes the plate until the front door is open, using a spring and blocking means such as a sliding button or electromagnet to ensure the rear door remains locked until the front door is opened, allowing the plate to pivot and release the control member only when the front door is closed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a complex disengaging mechanism is used to prevent rear door opening when front door is closed, then the reliability of door control is improved, but the device complexity and manufacturing cost increase

Engineering Contradiction:

Improvedoor control reliabilityVSAvoidmechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the blocking means (button or rod) with the existing door detection system, and integrates the plate mechanism with the transmission member. The blocking means is actuated by the same door position detection system that controls the front door locks, merging multiple functions into a unified mechanism that reduces overall complexity while maintaining reliability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The plate serves as an intermediary element between the transmission member and the control member. When the blocking means engages, the plate immobilizes the transmission member, preventing it from actuating the control member. This intermediary mechanism provides a simple yet reliable way to prevent rear door opening without requiring a complex disengaging system.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If a blocking mechanism is used to prevent rear door opening, then the protection against incorrect operation is improved, but the ease of manufacture deteriorates due to complex structure

Engineering Contradiction:

Improvedamage from incorrect operationVSAvoidmanufacturing ease

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The mechanism is segmented into distinct functional components: the blocking means (button or rod), the plate, the transmission member, and the control member. Each component has a specific function and can be manufactured independently using standard machining processes. The blocking means is a simple cylindrical component that can be easily produced, and the plate is a flat component with minimal features, both of which are straightforward to manufacture.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The blocking means uses simple, inexpensive components such as a cylindrical button or rod that can be easily replaced if needed. These components are made from common materials and require minimal processing, making them cost-effective and easy to manufacture compared to complex electronic or mechanical locking systems.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Ease of operation

If the plate is allowed to pivot freely, then the ease of operation is improved, but the reliability of door control deteriorates due to risk of accidental opening

Engineering Contradiction:

Improveoperating member actuationVSAvoiddoor control reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The plate's pivoting capability is dynamically controlled by the blocking means. When the front door is closed, the blocking means engages and immobilizes the plate, preventing any pivoting motion. When the front door is opened, the blocking means disengages and allows the plate to pivot freely. This dynamic control ensures that the plate can move when needed for door opening while preventing accidental movement when the door should remain locked.

Inventive Principle:

Principle #15Dynamics

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 mechanism is cost-effective and prevents accidental damage by ensuring the rear door cannot be opened until the front door is open, with a simple structure that is inexpensive to produce and reliable in operation.

Implementation Method 1

the transmission member comprises a spring returning it to the rest position, that is to say to the locking position of the door

Methodology Applied

Scientific EffectSpring: Spring

Implementation Method 2

this spring is loaded due to the pivoting of the transmission member driven by the maneuvering member

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentEP1724422B1Vehicle door opening control mechanism

Publication Date: 2008.01.23 FABI AUTOMOBILE

AI summary

The mechanism has disengaging units including a knob and a plate (6) pivotably mounted around an axle. The knob (7) blocks the rotation of the plate to immobilize the plate such that an activation of an operating device (3) allows the activation of a pivoting control unit (5) by an intermediary of a drive component (4) when the mechanism is in an engaged position. The knob liberates the rotation of the plate such that the activation of the device causes a rotation of the plate when the mechanism is in a disengaged position.