Infant Wagon Folding Frame Reduces Wheel Axial Distance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional infant wagons have a large axial distance between front and rear wheels, making it difficult for caregivers to change direction easily, leading to increased arm strain and foot collisions, and are cumbersome to store and carry due to complex wheel structures and brake issues.
Innovation Solution
The infant wagon features a folding main body frame with reduced wheel distance, symmetrical side frames, and adjustable handle frames, allowing for easier direction changes and storage, along with a simplified wheel attachment and brake system to minimize fatigue and enhance usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the axial distance between front wheels and rear wheels is reduced, then the radius of rotation is reduced and direction changing becomes easier, but the structural complexity increases
Solution Approach 1:
The main body frame is divided into front frame, rear frame, and side frames that can be folded relative to each other. This segmentation allows the frame to be collapsed into a compact configuration for storage while maintaining a stable rectangular structure during use, resolving the contradiction between ease of direction changing and structural complexity.
Solution Approach 2:
The frame incorporates folding joints that allow dynamic transformation between an extended operational state and a compact storage state. The side frames can be folded upward to reduce the axial distance between wheels, enabling easy direction changing when needed while reducing overall dimensions for storage when not in use.
2Ease of operation
If the axial distance between front wheels and rear wheels is reduced, then arm strain is reduced, but the stability of the wagon decreases
Solution Approach 1:
The brake mechanism is activated before moving the wagon to ensure the wheels are securely positioned and the frame is locked in its operational configuration. This preliminary stabilization prevents instability when the axial distance is reduced, allowing arm strain reduction without compromising wagon stability during use.
3Ease of operation
If the wheel structure is simplified for easy attachment and detachment, then storage convenience is improved, but the reliability of wheel attachment decreases
Solution Approach 1:
The wheels are designed as separable components that can be easily removed from the axle by extracting the wheel from the axle assembly. This extraction mechanism allows quick attachment and detachment for storage while maintaining secure attachment during use through proper seating of the wheel on the axle with retaining features.
4Ease of manufacture
If the brake structure is simplified, then production cost is reduced, but the reliability of brake function decreases
Solution Approach 1:
The brake mechanism is designed to automatically engage when the wagon is stationary or moving slowly, using the weight of the wagon and friction between the brake pad and wheel to maintain stopping force without requiring complex actuators or power sources. This self-service brake system reduces manufacturing complexity and cost while maintaining sufficient reliability for the application.
Data Source
AI summary
Provided herein is an infant wagon having improved convenience of use, wherein the infant wagon includes a front frame, a rear frame, a support frame, side frames, a front handle frame, and a rear handle frame, and is configured such that the axial distance between front wheels and rear wheels thereof is reduced, whereby it is possible to reduce the burden applied to the arms of a caregiver when the infant wagon is moved or when the direction of the infant wagon is changed, such that the radius of rotation of the infant wagon is reduced, whereby it is possible to easily change the direction of the infant wagon, such that, when the infant wagon is pushed from the rear thereof to move the infant wagon.