Stroller Folding Device Locking Member Misoperation Prevention

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Solution Overview

Problem

Existing foldable strollers are at risk of misoperation due to the pull handle being accidentally operated, leading to an unstable folding state and potential safety hazards for the baby or child in the stroller.

Innovation Solution

A folding device for strollers is introduced, featuring a folding assembly with a pull handle and a safety assembly that includes a locking member. The locking member is switchable between a locked and unlocked position, preventing the pull handle from being misoperated and ensuring the stroller remains stable during use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a pull handle is provided for folding the stroller, then the stroller can be folded when not in use to reduce occupied space, but the pull handle may be accidentally operated leading to misoperation and safety hazards

Engineering Contradiction:

Improvefolding functionVSAvoidoperation safety

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

A locking member is introduced as an intermediary component between the user and the folding mechanism. The locking member can be in a locked state to prevent accidental operation or an unlocked state to allow intentional folding, thus mediating between the need for folding functionality and the risk of misoperation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The locking member provides preliminary anti-action by preventing the pull handle from moving in the folding direction before any accidental operation can occur. The locking member is configured to restrict the movement range of the pull handle, counteracting any unintended folding forces.

Inventive Principle:

Principle #9Preliminary anti-action

2Reliability

If a locking member is added to prevent misoperation, then operation safety is improved, but the device complexity increases

Engineering Contradiction:

Improveoperation safetyVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The locking member is integrated with the existing handle frame structure rather than being a completely separate component. The locking member can be combined with the handle frame or other existing components, merging the safety function with the structural elements already present in the stroller.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The locking member is designed to be operable by the user through simple manual manipulation. The user can lock and unlock the mechanism themselves without requiring additional tools or complex operations, making the safety feature self-service and easy to use.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12280816B2Stroller, stroller frame and folding device thereof

Publication Date: 2025.04.22 WONDERLAND SWITZERLAND AG

AI summary

A folding device of a stroller includes a folding assembly which is configured to fold the stroller and a safety assembly. The folding assembly includes an operable pull handle. The pull handle is slidably sleeved over a handle frame of the stroller and is movable between a holding position and a release position. The safety assembly is configured to cooperate with the folding assembly, in which the safety assembly includes a locking member for preventing misoperation of the pull handle, and the locking member is switchable between a locked position and an unlocked position. The locking member is configured to prevent the pull handle from moving to the release position responsive to the locking member being in the locked position; and the locking member is entirely located inside the handle frame responsive to the locking member being in the unlocked position.