Folding Bike Expansion Unit for Progressive Child Riding Stages

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Solution Overview

Problem

Traditional children's bicycles have a fixed form, limiting their functionality and failing to provide a comprehensive and progressive riding experience, necessitating frequent replacements as children grow and their skills develop, which is financially burdensome and can dampen enthusiasm.

Innovation Solution

A multi-function folding bike with an expansion unit that transforms into multiple configurations, including balance training, assisted-riding, and standard bicycle forms, equipped with features like training wheels, pedals, kickstands, and a gear assembly, allowing adaptation to children's growth stages.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional children's bicycles have a fixed form, then the structure is simple and easy to manufacture, but the functionality is limited and cannot meet diverse needs at different growth stages

Engineering Contradiction:
ImprovefunctionalityVSAvoidstructure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The bicycle is divided into a main frame and a detachable expansion unit. The expansion unit can be removed or attached to transform the bicycle between different configurations (balance bike, training bike, standard bike), allowing functionality changes without permanently complicating the base structure.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The expansion unit serves multiple functions: it provides training wheels for balance training, includes a pedal assembly for assisted riding, and features a kickstand for stability. This single detachable component enables the bicycle to perform multiple functions across different growth stages.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If traditional children's bicycles have a fixed form, then the device complexity is low, but the bicycle cannot adapt to children's growth and skills development

Engineering Contradiction:
Improveadaptability to growth stagesVSAvoidconfiguration
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The bicycle configuration is made dynamic through the detachable expansion unit. Parents can adjust the bicycle's functionality over time by attaching or removing the expansion unit as the child's skills develop, transforming from a balance bike to a training bike to a standard bike.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The expansion unit is pre-equipped with all necessary components (training wheels, pedals, kickstand) that will be needed at different growth stages. This preliminary preparation allows immediate adaptation when the expansion unit is attached, without requiring additional modifications or accessories.

Inventive Principle:
Principle #10Preliminary action

3Ease of operation

If traditional children's bicycles lack auxiliary designs, then the structure is simple, but younger children cannot effectively practice and adapt due to insufficient balance and leg strength

Engineering Contradiction:
Improveease of practiceVSAvoidauxiliary components
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The expansion unit acts as an intermediary between the child and the bicycle. It provides auxiliary components (training wheels for balance support, pedals for powered assistance) that mediate the interaction, making the bicycle operable for children with limited balance and leg strength.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The pedal assembly includes a crank arm with a detachable connection to the main frame, allowing the child to independently attach and detach the pedal assembly as needed for assisted riding, fostering self-service capability.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS12565279B1Multi-function folding bike
Publication Date: 2026.03.03 SHI BAIFENG
  • US12565279B1 patent drawing
  • US12565279B1 patent drawing
  • US12565279B1 patent drawing

AI summary

The present invention discloses a multi-function folding bike pertaining to the field of bicycles. The bike comprises a main frame, an actuation button, a gear assembly, and an expansion unit. The expansion unit includes a training wheel, a pedal assembly, and a kickstand, wherein cooperative interaction of these components enables multiple configuration transformations to satisfy diverse functional riding requirements. Through selective combinations of elements within the expansion unit, the bike achieves morphological adaptations for: children's progressive riding skill development, cargo transportation capability, and personalized riding experiences, thereby accommodating evolving needs across different growth stages while significantly enhancing applicability and utility of the bicycle.