Folding Pull Rod Structure for Durable Packaging Cases

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Solution Overview

Problem

Existing telescopic pull rods in packaging cases are fragile, prone to damage, and have issues with parts falling out or failing to retract properly, leading to operational difficulties.

Innovation Solution

A packaging case with a folding pull rod design that includes a buckling groove and buckling member for securing the folded pull rod within the case body, using folding joints and elastic locking cores to maintain stability and durability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a telescopic pull rod is used, then the length can be adjusted flexibly, but the structure becomes fragile and prone to damage

Engineering Contradiction:

Improvelength adjustment flexibilityVSAvoiddurability of pull rod

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The pull rod is divided into multiple segments (first pull rod segment, second pull rod segment) connected by connecting members. This segmentation allows the pull rod to be folded into a compact shape when not in use, reducing the risk of damage while maintaining the ability to extend to the required length during use.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pull rod transitions between a folded state (when not in use) and an extended state (during use) through dynamic connecting members that allow controlled movement. This dynamic capability provides length adjustment flexibility while the folded state protects the structure from damage.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If a telescopic pull rod is used, then length adjustment is possible, but parts may fall out or become misplaced after prolonged use

Engineering Contradiction:

Improvelength adjustment capabilityVSAvoidoperational reliability

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The connecting members are pre-designed with limiting structures that prevent parts from falling out or becoming misplaced. These structures provide beforehand protection against the operational failures that occur in telescopic pull rods after prolonged use.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The connecting members act as intermediaries between the pull rod segments, not only allowing movement for length adjustment but also serving as mediators that guide and constrain the segments to prevent misplacement and ensure proper retraction.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If a telescopic pull rod is used, then flexible length adjustment is achieved, but the structure becomes complex and prone to failure

Engineering Contradiction:

Improvelength adjustabilityVSAvoidstructural complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The pull rod is segmented into manageable sections connected by simple connecting members, which reduces the overall structural complexity compared to a single telescopic mechanism while maintaining length adjustability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of using a traditional telescopic structure where segments slide within each other (complex), this invention uses a folded structure where segments connect at angles (simpler). The connecting members enable movement in the folded configuration, achieving length adjustment through a less complex arrangement.

Inventive Principle:

Principle #13The other way round (Inversion)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The folding pull rod structure is durable, easy to use, and occupies minimal space when not in use, addressing the fragility and operational issues of telescopic rods while ensuring secure and stable transportation.

Implementation Method 1

an elastic locking core is disposed on the folding rod, when the sleeve tube is sleeved over the outer side of the folding joint, the elastic locking core pops out to be buckled into the locking hole to lock the sleeve tube, and the elastic locking core is squeezed to contract inward to be separated from the locking hole to unlock the sleeve tube

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS20260000173A1Packaging case with folding pull rod

Publication Date: 2026.01.01 LENG LUHAO

AI summary

A packaging case with a folding pull rod, the packaging case includes a case body and the folding pull rod disposed on the case body, the folding pull rod has at least one fold, the case body includes a buckling groove and a buckling member, when the folding pull rod is folded, a rod body of the folding pull rod after being folded is embedded in the buckling groove and is fixed to the case body by buckling to the buckling member, and the buckling member is configured to release the folding pull rod.