Convertible Children’s Bike With Quick-Release Pedal Assembly

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Solution Overview

Problem

Children need to practice both balancing and pedaling on separate bikes, which is costly and space-consuming for parents.

Innovation Solution

A convertible children's bike that can switch between a pedal bike and a balance bike, featuring a bike frame, chain assembly, detachable pedal components, and a quick release assembly for easy conversion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If parents prepare both a balance bike and a pedal bike for children, then children can practice both balancing and pedaling, but this increases cost and occupies more space in the household

Engineering Contradiction:

Improvebike functionalityVSAvoidnumber of bikes

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The bike is designed with universal functionality to serve as both a balance bike and a pedal bike. The frame structure accommodates both configurations, and the pedal assembly can be detached or attached as needed, allowing one bike to fulfill the roles of two separate bikes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The pedal assembly is segmented into detachable components that can be separated from the main frame. This segmentation allows the bike to be reconfigured between balance bike mode (pedals removed) and pedal bike mode (pedals attached), enabling one bike to replace two.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If parents prepare both a balance bike and a pedal bike for children, then children can practice both balancing and pedaling, but this increases cost and occupies more space in the household

Engineering Contradiction:

Improvebike functionalityVSAvoidhousehold space

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If the bike structure includes detachable pedal components with quick release assembly, then conversion between pedal bike and balance bike is easy, but the device complexity increases

Engineering Contradiction:

Improveconversion easeVSAvoidbike structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The pedal assembly incorporates a quick-release mechanism that allows dynamic reconfiguration of the bike. The rod and handle assembly enables users to quickly attach or detach pedals without complex tools or procedures, making the bike adaptable to different usage modes with minimal effort.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250269929A1Children’s bike convertible between pedal bike and balance bike

Publication Date: 2025.08.28 WANG TAI CHIH

AI summary

A children's bike convertible between a pedal bike and a balance bike has a bike frame, two pedal components, and a quick release assembly. Each pedal component has a crank, a tube connected to a side of the crank, and a pedal connected to the other side of the crank. The tube is inserted into a bottom bracket of the bike frame. The quick release assembly is mounted through the tube of one of the two pedal components and connected to the tube of the other one of the two pedal components. By mounting the quick release assembly to fix the two pedal components to the bike frame, the children's bike can be used as a pedal bike. After detaching the quick release assembly, the two pedal components can be detached from the bike frame to convert the children's bike to a balance bike.