Wheel Braking Mechanism Dust Shield for Debris-Blocked Sliding Holes

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Solution Overview

Problem

Existing wheel braking mechanisms in baby carriers are prone to debris accumulation, which affects the normal functioning of the braking assembly due to the limited discharge of debris through the discharge hole, leading to potential safety hazards.

Innovation Solution

A wheel braking mechanism with a dust shield that slides over the sliding hole to prevent debris entry, combined with a dust-proof cover for the mounting opening and a pivotally connected dust shield to shield the sliding hole, ensuring continuous protection against debris ingress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a discharge hole is provided at the bottom of the wheel base housing assembly to facilitate debris discharge, then debris can be discharged from the housing assembly, but the discharge hole's position and diameter limit the effectiveness of debris removal, leading to debris accumulation that affects braking function

Engineering Contradiction:

Improvedebris accumulationVSAvoidbraking function

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The dust shield extracts and isolates the harmful factor (debris) by creating a protective barrier around the sliding hole, preventing debris from entering the critical braking components while allowing the discharge hole to continue its function at the bottom of the housing assembly

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The dust shield acts as an intermediary element between the external environment (where debris exists) and the internal braking mechanism, filtering out harmful particles while allowing necessary movements of the braking pin through the sliding hole

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the braking pin moves through the sliding hole to lock and unlock the wheel, then the braking mechanism can function, but the open sliding hole allows debris to enter the wheel base housing assembly and accumulate

Engineering Contradiction:

Improvebraking pin movementVSAvoiddebris entry

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The dust shield functions as a flexible protective barrier that can accommodate the movement of the braking pin through the sliding hole while maintaining its protective function, allowing operational freedom while preventing harmful debris entry

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS12617447B2Wheel braking mechanism, frame, and child carrier

Publication Date: 2026.05.05 WONDERLAND SWITZERLAND AG

AI summary

The present application relates to a wheel braking mechanism, a frame and a child carrier. The wheel braking mechanism includes a wheel base housing assembly, a braking assembly mounted in the wheel base housing assembly, and a braking pin connected to the braking assembly. A side wall of the wheel base housing assembly is provided with a sliding hole configured to allow the braking pin to extend through. The braking pin is capable of sliding in the sliding hole between a locking position and an unlocking position. The wheel braking mechanism further includes a dust shield. The dust shield is engaged with the braking pin and shields the sliding hole to prevent external debris from entering an interior of the wheel base housing assembly through the sliding hole.