Stroller Front Guard Latch for Compact Folding and Easy Use

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Conventional child stroller apparatuses require separate detachment and storage of the front guard, making them inconvenient to use.

Innovation Solution

A child stroller apparatus with a locking mechanism that allows the front guard to be pivotally connected and locked to the handle frame, enabling easy folding and unfolding without separate detachment, using a release actuator to unlock the front guard for compact storage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the front guard is detachably attached to the stroller frame, then the stroller can be folded to a compact size, but the operation becomes inconvenient due to separate detachment and storage requirements

Engineering Contradiction:
Improvefolded sizeVSAvoidoperation convenience
Core Design Contradiction:
Volume of moving objectVSEase of operation

Solution Approach 1:

The front guard is merged with the stroller frame through a locking mechanism that integrates both components. The latch assembly combines the locking and unlocking functions within the same structural unit, eliminating the need for separate detachment and storage operations while maintaining compact folding capability.

Inventive Principle:
Principle #5Merging (Combining)

2Ease of operation

If the front guard is permanently attached to the stroller frame, then operation convenience is improved, but the folding capability is compromised

Engineering Contradiction:
Improveoperation convenienceVSAvoidfolded size
Core Design Contradiction:
Ease of operationVSVolume of moving object

Solution Approach 1:

The connection between the front guard and stroller frame is made dynamic through the locking mechanism. The latch assembly can transition between locked and unlocked states, allowing the front guard to be securely attached during use and easily detached during folding, providing both operational convenience and compact storage.

Inventive Principle:
Principle #15Dynamics

3Ease of operation

If a locking mechanism is added to connect the front guard and handle frame, then operational convenience is improved, but device complexity increases

Engineering Contradiction:
Improveoperation convenienceVSAvoidmechanism complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The locking mechanism is segmented into distinct functional components: the latch assembly for locking/unlocking, the release actuator for triggering the latch, and the coupling parts for connection. This segmentation allows each component to perform its specific function efficiently while maintaining overall simplicity and ease of manufacturing.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentEP4034450B1Child stroller apparatus
Publication Date: 2026.02.11 WONDERLAND SWITZERLAND AG
  • EP4034450B1 patent drawingFigure 1
  • EP4034450B1 patent drawingFigure 2
  • EP4034450B1 patent drawingFigure 3

AI summary

A child stroller apparatus includes a standing frame, a handle frame pivotally coupled to the standing frame and having a first coupling part, a front guard having a second coupling part pivotally connected with the first coupling part, and a locking mechanism including a front guard latch. The handle frame is rotatable for folding and unfolding the child stroller apparatus. The front guard is positionable in a deployed configuration while the child stroller apparatus is in an unfolded state. The front guard latch is movable between a locking position where it is engaged with the first and second coupling parts so that the front guard is locked to the handle frame in the deployed configuration, and an unlocking position where the front guard latch is disengaged from one of the first and second coupling parts for rotation of the front guard relative to the handle frame and the standing frame.