Adjustable Joint Assembly for Child Trailer Coupling

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Solution Overview

Problem

Parents face physical strain and discomfort when carrying bulky children's goods outdoors, and using shopping carts can be unsafe and unsanitary for children.

Innovation Solution

A child trailer that can be securely attached to a stroller or hand-moving cart, featuring an adjustable joint assembly and coupler with shock-absorbing wheels, allowing for flexible adjustment to fit various chassis sizes and types, providing a platform for children to stand or goods to be held.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If parents carry goods in backpacks or bags, then they can transport necessary items, but the physical burden on shoulders and arms increases significantly

Engineering Contradiction:

Improvecapacity for carrying goodsVSAvoidphysical comfort of parents

Core Design Contradiction:

Quantity of substanceVSEase of operation

Solution Approach 1:

The child trailer serves as an intermediary carrier between the stroller and the goods. By attaching the trailer to the stroller frame, the system transfers the burden of carrying goods from the parents' shoulders to the stroller's wheel assembly, eliminating the physical strain while maintaining carrying capacity

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention merges the functions of a stroller and a cargo carrier into a single integrated system. The child trailer combines the child support function of the stroller with the goods carrying function of a backpack, allowing both children and goods to be transported simultaneously without additional parental burden

Inventive Principle:

Principle #5Merging (Combining)

2Ease of operation

If shopping carts are used to carry children, then parental burden is reduced, but safety risks increase due to toppling and collision

Engineering Contradiction:

Improvereduction of parental burdenVSAvoidsafety of child

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The child trailer is designed as a separate, dedicated platform attached to the stroller, rather than modifying a shopping cart. This segmentation allows the child carrier to be specifically engineered for safety with proper restraints and stable geometry, while the shopping cart remains for its intended commercial use

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Rather than attempting to adapt existing shopping carts for child carrying, the invention uses a purpose-built child trailer designed specifically for this function. The specialized design ensures safety requirements are met without relying on the unsuitable structure of shopping carts

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Ease of operation

If shopping carts are used to carry children, then carrying burden is reduced, but hygiene issues arise from bacterial contamination on steel racks

Engineering Contradiction:

Improvereduction of parental burdenVSAvoidbacterial contamination of child

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The child trailer acts as an intermediary platform that separates the child from direct contact with potentially contaminated surfaces. The trailer's contact surfaces can be easily cleaned and maintained, providing a hygienic barrier between the child and the external environment

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention employs a dedicated child trailer with surfaces designed for easy cleaning and sanitation, rather than using shopping cart surfaces that are difficult to sanitize. The specialized design allows for maintaining high hygiene standards through regular washing of the trailer platform

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

4Ease of operation

If stroller is made foldable for easy carrying and storing, then portability is improved, but space for holding goods is reduced

Engineering Contradiction:

Improveportability of strollerVSAvoidspace for holding goods

Core Design Contradiction:

Ease of operationVSQuantity of substance

Solution Approach 1:

The system separates the child carrier (stroller) from the goods carrier (trailer). The stroller remains compact and foldable for portability, while the separate trailer provides additional cargo space that can be attached when needed and detached when not required, maintaining the foldability benefit while adding carrying capacity

Inventive Principle:

Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The child trailer alleviates parental burden by providing a stable and sanitary solution for carrying children and goods, enhancing mobility and safety while reducing the risk of injury or contamination.

Implementation Method 1

two wheel assemblies at the rear bottom of two sides thereof equipped with shock-absorbing function

Methodology Applied

Scientific EffectShock absorption: Damping

Data Source

PatentUS8146936B2Child trailer

Publication Date: 2012.04.03 LAI CHIN I

AI summary

A child trailer includes a body which includes a plurality of wheel assemblies at the bottom and a joint assembly at the front side to adjust the angle relative to the body. Hence the child trailer can be maintained at a desired angle to support standing of a child or holding of goods. The joint assembly includes a coupler at the front side to fasten the child trailer to the chassis such as a wheel axle, frame or handle of a stroller, thereby can facilitate standing of the child or holding of goods.