Pivoting Drop-Side Crib Rail for Safe Child Access

Solution Overview

Problem

The existing drop side rail mechanism in cribs is prone to incorrect assembly, leading to safety hazards, and making it difficult to remove or place a child in the crib, prompting a proposal to make both side rails permanent, which complicates child access.

Innovation Solution

A crib design featuring a drop side rail with a pivotally and slidably lowered upper rail section relative to a stationary lower rail section, connected via levers, allowing the upper rail to move parallel and in front of the lower rail, with a holding arrangement to secure the rail in a raised position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a drop side rail mechanism is used to ease child access, then ease of operation is improved, but reliability deteriorates due to incorrect assembly and potential disassembly

Engineering Contradiction:

Improveease of child accessVSAvoidsafety of side rail assembly

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The side rail is divided into multiple sections: a stationary lower section and a movable upper section. This segmentation allows the lower section to remain fixed and secure while the upper section can be safely lowered for child access, resolving the contradiction between ease of operation and reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The side rail transitions from a static fixed structure to a dynamic system with controlled movement. The upper rail section can pivot and slide between raised and lowered positions through a controlled mechanism, providing ease of operation when needed while maintaining reliability through the stationary lower section and guide constraints.

Inventive Principle:

Principle #15Dynamics

2Reliability

If both side rails are made permanent to improve reliability, then safety is improved, but ease of operation deteriorates as child access becomes difficult

Engineering Contradiction:

Improvesafety of side rail assemblyVSAvoidease of child access

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The side rail is divided into multiple sections: a stationary lower section and a movable upper section. This segmentation allows the lower section to remain fixed and secure while the upper section can be safely lowered for child access, resolving the contradiction between ease of operation and reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The side rail transitions from a static fixed structure to a dynamic system with controlled movement. The upper rail section can pivot and slide between raised and lowered positions through a controlled mechanism, providing ease of operation when needed while maintaining reliability through the stationary lower section and guide constraints.

Inventive Principle:

Principle #15Dynamics

3Ease of manufacture

If a simple sliding mechanism is used for the drop side rail, then ease of manufacture is improved, but reliability worsens due to incorrect assembly by consumers

Engineering Contradiction:

Improvesimplicity of rail mechanismVSAvoidcorrect assembly by consumers

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The side rail assembly is segmented into distinct components with defined functions: stationary lower rail, movable upper rail, levers, and guides. This clear segmentation makes it easier to manufacture each component separately and reduces assembly errors by making the connection points and mechanisms more intuitive and less prone to incorrect installation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The lever mechanism acts as an intermediary between the user's manual input and the rail movement. Instead of directly sliding the rail, the user operates levers that translate simple pushing motions into controlled pivoting and sliding actions, making the mechanism more intuitive to operate and assemble correctly while maintaining reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 safety by preventing accidental disassembly while maintaining ease of child access by allowing the upper rail section to be lowered for entry and exit, addressing the difficulties posed by permanent side rails.

Implementation Method 1

A first lever has one end pivotally mounted to the drop side rail and an opposite end slidably mounted with the first elongated guide, and a second lever has one end pivotally mounted to the drop side rail and an opposite end slidably mounted with the second elongated guide

Methodology Applied

Scientific EffectLever: Lever

Data Source

PatentUS7752689B1Crib with pivoting and sliding drop side rail

Publication Date: 2010.07.13 DELTA ENTERPRISE CORP

AI summary

A connecting arrangement for slidably securing a drop side rail to vertical posts of the headboard and footboard of a crib, including first and second elongated slots in the vertical posts of the headboard and footboard, respectively, third and fourth elongated slots at opposite sides of the drop side rail, first and second levers having one end pivotally mounted to opposite sides of the drop side rail and an opposite end slidably mounted with the first and second elongated slots, respectively, third and fourth levers having one end pivotally mounted to the vertical post of the headboard and footboard, respectively, and an opposite end slidably mounted with the third and fourth elongated slots, respectively, and a holding arrangement for releasably holding the drop side rail in an upper raised position.