Building Block String Assembly With Dual Threading Sections

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Solution Overview

Problem

Existing string accessories with building blocks face assembly difficulties due to flipping and misalignment issues when threading, leading to low efficiency and inconvenience during assembly.

Innovation Solution

A building block string accessory design featuring mirror-symmetrical stringing structures, a closed-loop string structure, and a connecting member that allows for easy threading and alignment, enabling assembly with both hands and reducing misalignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If two strings are used to thread the building blocks, then the blocks can be secured onto the strings, but the strings become misaligned and assembly becomes difficult

Engineering Contradiction:

Improvesecuring building blocks onto stringsVSAvoidassembly difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The string is divided into two independent threading sections that can be threaded through the building blocks separately. Each threading section operates independently, allowing one hand to hold the string while the other hand threads the building blocks, preventing misalignment between the two strings during assembly.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The building block serves as an intermediary tool during assembly. The stringing through-holes in the building blocks provide precise alignment references, allowing the threading sections to be accurately positioned relative to each other while being threaded through the blocks one by one.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If one hand operates to press blocks onto strings, then assembly can be performed, but the process becomes inconvenient and low efficiency

Engineering Contradiction:

Improveassembly processVSAvoidassembly efficiency

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The building blocks with their built-in stringing structures and through-holes perform the alignment and positioning function automatically during threading. The stringing structures are designed to naturally guide the threading sections into correct alignment, eliminating the need for complex manual adjustment operations.

Inventive Principle:

Principle #25Self-service

3Device complexity

If building blocks are threaded into a loop with one string, then the structure is simple, but the blocks flip between front and back sides during wear

Engineering Contradiction:

Improvestring structureVSAvoidblock orientation stability

Core Design Contradiction:

Device complexityVSStability of the object's composition

Solution Approach 1:

The single string is segmented into two separate threading sections that pass through the building blocks in opposite directions. This segmentation allows the blocks to be secured in a stable orientation while maintaining a relatively simple overall structure, preventing the blocks from flipping during wear.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20260026583A1Building block string accessory

Publication Date: 2026.01.29 CHEN YINGFAN

AI summary

Provided herein is a building block string accessory including a building block and a string. A first side of the building block is provided with a pair of mirror-symmetrical stringing structures that are spaced apart, each stringing structure having a stringing through-hole. The string includes two threading sections and two connecting sections, which are alternately arranged and interconnected to form a closed-loop structure. The threading sections are aligned with the stringing structures and are threaded through stringing through-holes of the stringing structures. A connecting member is provided between the two connecting sections, and the connecting member is detachably connected to the two connecting sections.