Anti-twist Strap Guide for Safety Seat Harnesses

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Solution Overview

Problem

Safety seat harness straps often twist, preventing proper adjustment and secure fastening of children in car seats due to the straps' inability to pass through intended orifices correctly.

Innovation Solution

A device with an adjustable body portion and a slit that can be expanded or retracted to fit the strap, positioned below the chest or bottom clip, to prevent twisting by ensuring the strap remains aligned and secure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the strap is allowed to move freely for easy adjustment, then the ease of operation is improved, but the strap becomes twisted and cannot be properly secured

Engineering Contradiction:

Improveease of strap adjustmentVSAvoidproper strap alignment and secure fastening

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

A guide device with a body and opening is introduced as an intermediary component between the strap and the buckle. The guide device maintains proper strap alignment through its structured opening while allowing the strap to move freely for adjustment, thus preventing twisting and ensuring reliable fastening

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The alignment and anti-twist function is extracted from the strap itself and implemented as a separate guide device. This allows the strap to remain flexible and easy to adjust while the guide device provides the necessary structural constraints to prevent twisting

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If a rigid structure is used to prevent strap twisting, then the reliability of strap alignment is improved, but the ease of adjustment and operation deteriorates

Engineering Contradiction:

Improvestrap alignment preventionVSAvoidstrap adjustment flexibility

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The guide device is constructed from flexible material that can bend and deform to accommodate strap adjustments. This flexibility allows easy operation and adjustment while the device's structural opening maintains proper alignment and prevents twisting

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The guide device transitions from a static rigid structure to a dynamic flexible component that can adapt its shape during strap adjustment. The flexible material allows the device to deform temporarily during adjustment and then return to its original alignment-maintaining shape

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS9205804B2Device for preventing twisting of a strap of a safety seat and method for using same

Publication Date: 2015.12.08 BERNARDO JEANNINE

AI summary

A method for preventing twisting of a strap of a car seat, the method comprising receiving the strap through a body portion of a device, wherein the body portion includes opposite open ends, and wherein the strap extends through the body portion and protrudes from each of the ends, and positioning the device below at least one of a chest clip and a bottom clip coupled to the strap.