Telescopic Paper Straw with Locking Elements for Axial Stability

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Solution Overview

Problem

Plastic telescopic drinking straws pose a significant environmental threat due to their long decay period, and existing biodegradable alternatives suffer from axial instability and material inefficiency.

Innovation Solution

A telescopic paper straw design featuring locking elements on both the inner and outer surfaces, spaced at least half the diameter apart, with varying heights and widths to ensure axial stability and airtight sealing, minimizing material consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If telescopic straws are made from plastic materials, then structural stability and sealing are achieved, but environmental harm increases due to long decay period

Engineering Contradiction:

Improvestructural stabilityVSAvoidenvironmental harm

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the material parameter from plastic to paper, fundamentally altering the decay characteristics while maintaining the telescopic functional parameters through optimized locking element geometry and arrangement

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses paper as a biodegradable material alternative to plastic, creating a composite structure with locking elements that provide mechanical stability while the base material provides environmental compatibility

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If biodegradable materials such as paper are used, then environmental harm is reduced, but axial stability deteriorates

Engineering Contradiction:

Improveenvironmental harmVSAvoidaxial stability

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The straw is divided into multiple segments (first straw and second straw) connected by locking elements, allowing each segment to maintain structural integrity while enabling telescopic movement and improving overall axial stability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The locking elements feature curved engagement surfaces that provide mechanical interlocking, transforming the linear paper structure into a stabilized assembly with resistance to axial displacement

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Reliability

If conventional locking mechanisms are used, then connection stability is achieved, but material consumption increases

Engineering Contradiction:

Improveconnection stabilityVSAvoidmaterial consumption

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The locking elements are integrated directly into the straw walls themselves, merging the structural material with the locking function, thereby eliminating separate locking components and reducing overall material consumption

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The locking elements serve multiple functions: providing mechanical interlocking for stability, creating sealing surfaces for leak prevention, and enabling telescopic movement, thereby reducing the need for additional specialized components

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Reliability

If locking elements are spaced closely, then connection stability is improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improveconnection stabilityVSAvoidlocking element spacing precision

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The locking elements are designed to self-align during assembly, with their geometry and arrangement allowing automatic positioning that compensates for manufacturing tolerances, reducing the precision requirements while maintaining connection stability

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12446718B2Telescopic paper drinking straw

Publication Date: 2025.10.21 INTERNATIONAL TOBACCO MACHINERY POLAND SP ZOO

AI summary

The object of the application is a telescopic paper drinking straw comprising: a first straw with a first outer diameter, a second straw with a second inner diameter, the first straw with the first outer diameter being situated at least partly inside the straw having the second inner diameter, coaxially with the straw having the second inner diameter, characterised in that the first straw has at least two locking elements protruding from the outer surface of the first straw, and the second straw has at least two locking elements protruding from the inner surface of the second straw.