Convertible Tandem Stroller Frame with Front Release Actuator

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Solution Overview

Problem

Existing tandem strollers are expensive and cumbersome for single-child households, as they are often unnecessary and difficult to maneuver and fold, with conversion mechanisms typically located at the rear, making it hard to operate single-handedly.

Innovation Solution

A convertible tandem stroller frame with a release actuator at the front end that allows for easy conversion between tandem and single stroller modes by locking and unlocking a longitudinal telescopic mechanism, enabling single-handed operation and compact folding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the release actuator is mounted at the rear end of the tandem stroller, then the conversion mechanism can be simplified, but it becomes difficult to operate single-handedly and requires the user to manipulate behind the stroller while reaching forward

Engineering Contradiction:
Improveconversion mechanismVSAvoidactuator operation
Core Design Contradiction:
Device complexityVSEase of operation

Solution Approach 1:

The release actuator is inverted from the conventional rear-mounted position to a front-mounted position on the stroller frame. This allows the user to operate the conversion mechanism from the front of the stroller, enabling single-handed operation while pushing, rather than having to reach back and manipulate controls from behind the stroller

Inventive Principle:
Principle #13The other way round (Inversion)

2Adaptability or versatility

If the stroller frame is extended into tandem mode, then it can transport two occupants, but it becomes awkward to push and control when transporting a single child due to off-balance alignment

Engineering Contradiction:
Improvetransport capacityVSAvoidpushing and control
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The stroller frame incorporates a telescopic mechanism that allows dynamic adjustment of the frame length between tandem mode (extended) and single mode (retracted). This enables the stroller to adapt its configuration based on the number of occupants, maintaining proper balance and ease of control whether transporting one or two children

Inventive Principle:
Principle #15Dynamics

3Adaptability or versatility

If a tandem stroller is purchased for occasional use with another child, then two children can be transported simultaneously, but it is expensive and wasteful when the tandem mode is unnecessary most of the time

Engineering Contradiction:
Improvetransport modeVSAvoidcost
Core Design Contradiction:
Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The stroller is designed with multi-functionality, allowing it to operate in both tandem mode (transporting two occupants) and single mode (transporting one occupant). The telescopic frame mechanism enables the same stroller to serve different transport needs, eliminating the requirement to purchase separate strollers for different family situations

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

Data Source

PatentUS8915516B2Convertible tandem stroller frame
Publication Date: 2014.12.23 SHANGHAI DOREL JUVENILE CO LTD
  • US8915516B2 patent drawing
  • US8915516B2 patent drawing
  • US8915516B2 patent drawing

AI summary

A convertible tandem stroller frame is capable of locking in a tandem stroller mode for installing a second seat thereby concurrently transporting two occupants, and capable of converting said mode into a single seat mode for transporting single occupant by simply manipulating a release actuator at a front portion of the convertible tandem stroller frame. The convertible tandem stroller frame may include a front rack, a rear rack, at least a longitudinal telescopic mechanism and at least a locking mechanism. The front rack and the rear rack are lockably and adjustably connected by the longitudinal telescopic mechanism, so as to be extended into the tandem stroller mode and be retracted into the single seat mode. The locking mechanism is associated with the release actuator for locking and un-locking the longitudinal telescopic mechanism by manipulating in front of the convertible tandem stroller frame.