Baby Carriage Seat Back Webbing Lock for Recline Adjustment

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Solution Overview

Problem

Existing baby carriages lack a simple and effective mechanism for caregivers to adjust the recline angle of the seat back, which is essential for the comfort and safety of babies during sleep or dining.

Innovation Solution

A baby carriage design featuring a frame, a lock mechanism, and webbing, where the webbing passes through a through hole in the lock mechanism's housing and is wound around the seat back, allowing the recline angle to be adjusted by releasing and pulling or loosening the webbing, and then locked in place using the lock member.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a mechanism is added to adjust the recline angle of the seat back, then the usability and comfort for babies is improved, but the device complexity increases

Engineering Contradiction:

Improverecline angle adjustment capabilityVSAvoidmechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent uses webbing (a flexible strip material) instead of rigid mechanical linkages to control the seat back recline angle. The webbing can be easily pulled or released to adjust the angle, providing adaptability while maintaining simplicity in the overall mechanism design.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent extracts the essential function of angle adjustment by using a simple lock mechanism that can be easily operated by caregivers. The complex multi-position locking systems are replaced with a straightforward webbing-based tensioning system that achieves the same adaptability goal with reduced complexity.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If a lock mechanism is used to secure the seat back at adjusted positions, then the safety and stability are improved, but the ease of operation decreases

Engineering Contradiction:

Improveseat back position stabilityVSAvoidadjustment operation difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The lock mechanism is designed to be automatically engaged when the webbing is released, allowing the seat back to self-lock at the desired position without requiring complex manual intervention. This maintains reliability while improving ease of operation.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The webbing acts as an intermediary between the caregiver's simple pulling action and the seat back positioning system. By tensioning or releasing the webbing, the caregiver can easily adjust the seat back angle while the lock mechanism automatically ensures stable positioning at the chosen angle.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS9102348B2Baby carriage capable of adjusting recline angle of seat back

Publication Date: 2015.08.11 WONDERLAND SWITZERLAND AG

AI summary

A baby carriage includes a frame, a lock mechanism, a seat back and a webbing. The frame has a first end and a second end opposite to the first end. The lock mechanism has a housing and a lock member, the housing is disposed on the first end, a through hole is formed on the housing, and the lock member is disposed in the through hole. The webbing passes through the through hole, it is wound around a back side of the seat back and attached on the second end. The webbing is clamped in the lock member, so as to keep the seat back at a recline angle. When the lock member is operated to release the webbing, the webbing is capable of moving within the through hole, so as to adjust the recline angle of the seat back.