Quick-Release Pin Connection for Space-Saving Furniture Assembly

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Solution Overview

Problem

Sofas and chairs made of metal material with welded or screwed seat cushions and frames occupy excessive space during transportation and assembly, necessitating improved connecting structures for easy disassembly and assembly.

Innovation Solution

A quick disassembly and assembly type connecting structure using a quick-release pin head and pin seat with an inverted T-shaped slideway and conical vertical opening, made of stainless steel, allowing for stable and flexible mounting and dismounting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If welded or screwed connecting structures are used, then connection strength is improved, but assembly and disassembly time increases and flexibility decreases

Engineering Contradiction:
Improveconnection strengthVSAvoidassembly and disassembly time
Core Design Contradiction:
StrengthVSLoss of time

Solution Approach 1:

The connecting structure is divided into separate components: a pin head, a pin seat with slideway, and a mounting plate. This segmentation allows the connection to be quickly assembled by sliding the pin head into the pin seat and quickly disassembled by withdrawing it, eliminating the time-consuming processes of welding or screwing while maintaining connection strength through the friction fit and geometric constraints of the slideway design.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The connecting structure transitions from a static permanent connection (welding/screws) to a dynamic reversible connection. The pin head can be freely inserted and removed from the pin seat along the slideway, enabling rapid reconfiguration and disassembly while maintaining a stable connected state when assembled, thus reducing assembly and disassembly time without sacrificing connection strength.

Inventive Principle:
Principle #15Dynamics

2Stability of the object's composition

If welded or screwed connecting structures are used, then connection stability is improved, but adaptability and flexibility decrease

Engineering Contradiction:
Improveconnection stabilityVSAvoidflexibility
Core Design Contradiction:
Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The connecting structure enables dynamic reconfiguration by allowing the pin head to be easily inserted and removed from the pin seat. This provides flexibility for different assembly configurations and adaptability for various application scenarios while maintaining connection stability when assembled through the friction fit and geometric constraints of the inverted T-shaped slideway.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The quick-release connecting structure with its standardized pin head and pin seat design can be applied to multiple different components and scenarios (such as seat cushions and frames of sofas or chairs). The universal design allows the same connecting mechanism to serve different functions and configurations, enhancing adaptability while maintaining stable connections when assembled.

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

3Productivity

If quick-release pin structure is used, then assembly and disassembly speed is improved, but connection strength may decrease

Engineering Contradiction:
Improveassembly and disassembly speedVSAvoidconnection strength
Core Design Contradiction:
ProductivityVSStrength

Solution Approach 1:

The slideway is designed with an inverted T-shaped cross-section and conical vertical opening, creating specific local geometric features that enhance the friction fit and mechanical interlocking between the pin head and pin seat. These localized structural characteristics provide sufficient connection strength through friction and geometric constraints, while still allowing rapid assembly and disassembly by overcoming the insertion force.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The conical structure of the vertical opening and the corresponding conical position of the pin head end create a tapered fit that increases friction and mechanical interlocking. This parameter change in the geometric shape enhances the connection strength of the quick-release mechanism, ensuring that the rapid assembly and disassembly process does not compromise the strength of the connection when assembled.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS20260063157A1Quick disassembly and assembly type connecting structure
Publication Date: 2026.03.05 GUANGDONG DERUI SMART HOME CO LTD
  • US20260063157A1 patent drawing
  • US20260063157A1 patent drawing
  • US20260063157A1 patent drawing

AI summary

The present disclosure relates to the technical field of hardware fittings, and in particular to a quick disassembly and assembly type connecting structure, including a quick-release pin head and a quick-release pin seat. The quick-release pin head and the quick-release pin seat are slidably arranged. A cross section of a slideway of the quick-release pin seat is of an inverted T-shaped structure. The quick-release pin head is slidably in close fit with the slideway. A mounting plate is welded and fixed to an end of the quick-release pin head. The quick-release pin head and the quick-release pin seat are slidably arranged and thus can be quickly spliced. Compared to a screw or welding mounting method, better flexibility is achieved. In the transfer of an object equipped with the quick-release structure, the quick disassembly and assembly type connecting structure can be separated for transportation, thereby reducing an occupation of space.