Split-Pin Furniture Panel Joint for Narrow-Space Assembly

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Solution Overview

Problem

Existing joining devices for furniture panels, such as between a shoulder and a shelf, face challenges when assembled in narrow spaces, particularly in recesses with limited width, as they require significant space for assembly and can be complicated and expensive to construct, making it difficult to assemble and position the panels stably.

Innovation Solution

A joining device with a pin divided into two sections, one on each panel, allowing for minimal distance between panels and automatic positioning, using a grub screw and barrel system with a contrast spring for secure coupling, enabling assembly and disassembly in tight spaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a traditional pin and eccentric joint system is used for joining furniture panels, then the connection between panels is stable and reliable, but the device requires significant space for assembly and cannot be used in narrow recesses

Engineering Contradiction:
Improveconnection stabilityVSAvoidassembly space requirement
Core Design Contradiction:
ReliabilityVSArea of stationary object

Solution Approach 1:

The pin is divided into two separate sections: a first section with a coupling extension that receives the protruding pin, and a second section with an enlarged element that acts as the protruding pin. This segmentation allows each section to be independently positioned in separate holes of the two panels, eliminating the need for large clearance space and enabling assembly in narrow recesses while maintaining stable connection

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The coupling extension of the first pin section is designed to receive and nest the enlarged element of the second pin section. This nesting arrangement allows the two pin sections to couple together in a compact manner, minimizing the distance required between panels during assembly and enabling installation in confined spaces

Inventive Principle:
Principle #7Nested doll (Nesting)

2Area of stationary object

If existing joining devices are used in narrow spaces, then assembly might be possible, but the construction becomes complicated and expensive

Engineering Contradiction:
Improveassembly spaceVSAvoidjoint construction complexity
Core Design Contradiction:
Area of stationary objectVSDevice complexity

Solution Approach 1:

By dividing the pin into two simple sections with standardized features (coupling extension and enlarged element), the invention achieves compact assembly capability without introducing complex mechanisms. Each section can be manufactured independently using standard machining processes, keeping production simple and cost-effective

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The pin coupling mechanism serves multiple functions: it provides stable connection between panels, enables assembly in narrow spaces, and allows for simple manufacturing. The standardized coupling extension and enlarged element design can be universally applied to various furniture panel joining applications, reducing overall system complexity

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

3Adaptability or versatility

If traditional joining devices are used, then panels can be connected in open spaces, but they cannot be assembled inside recesses with limited width

Engineering Contradiction:
Improveassembly location flexibilityVSAvoiddistance between panels
Core Design Contradiction:
Adaptability or versatilityVSLength of moving object

Solution Approach 1:

The divided pin structure allows the first and second sections to be positioned in separate holes that are closer together than traditional single-pin designs. The coupling extension and enlarged element can engage with minimal clearance, enabling assembly inside recesses with limited width where traditional devices cannot reach

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The nesting of the enlarged element within the coupling extension creates a compact joint that requires minimal distance between panels. This allows the joining device to be assembled inside recesses with limited width, significantly improving adaptability to different assembly locations including confined spaces

Inventive Principle:
Principle #7Nested doll (Nesting)

Data Source

PatentEP3938664B1Joining device for furniture panels
Publication Date: 2024.01.03 LEONARDO
  • EP3938664B1 patent drawingFigure 1~6
  • EP3938664B1 patent drawingFigure 2~5
  • EP3938664B1 patent drawingFigure 7a~8a

AI summary

A joining device between two panels of furniture or other furnishing items, one (11) positioned perpendicular to the other (12), wherein a pin or plug extends from a first panel (11 or 12) and is inserted in a complementary seat of a second panel (12 or 11), a stable connection and blocking system (114) of said pin or plug being provided within said seat, with an edge (B) of a panel (11) firmly abutted against a surface (C) of the other panel (12), wherein said pin or plug is divided into two sections (521, 522), a first section provided on the first panel (11 or 12) and a second section provided on the second panel (12 or 11), releasably intercoupled with each other on a plane parallel to one of said panels (11 or 12).