Thermoplastic Cage Wall Coupling for Quiet Snap-Fit Assembly

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Solution Overview

Problem

Traditional metal wire couplings for pet cages are costly, labor-intensive, noisy, unstable, and pose safety risks due to sharp edges, while also increasing production complexity and transport volume.

Innovation Solution

A thermoplastic coupling element with flexible flaps is used to connect grilled walls, eliminating the need for welding and allowing precise assembly, reducing labor costs and noise, and ensuring stability and safety.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If traditional metal wire couplings are used to connect grilled walls, then mechanical strength is improved, but production cost and labor intensity increase

Engineering Contradiction:

Improvemechanical strengthVSAvoidproduction cost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent replaces expensive metal wire couplings that require welding with inexpensive plastic clips that can be easily attached and removed. These plastic clips are designed as disposable or easily replaceable components, eliminating the need for costly welding operations and specialized labor, thereby significantly reducing production costs while maintaining adequate mechanical strength for the application.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent substitutes the traditional mechanical welding process with a simpler clipping mechanism. Instead of permanently joining metal components through welding, the invention uses plastic clips that mechanically engage with the grilled wall structure, eliminating the need for welding equipment, skilled welders, and post-welding treatments, thus reducing both direct and indirect manufacturing costs.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Stability of the object's composition

If traditional metal wire couplings are used, then structural stability is improved, but assembly precision deteriorates

Engineering Contradiction:

Improvestructural stabilityVSAvoidassembly precision

Core Design Contradiction:

Stability of the object's compositionVSManufacturing precision

Solution Approach 1:

The patent incorporates localized features in the plastic clips, such as integrated positioning elements, guide ribs, and snap-fit mechanisms, that ensure precise alignment and attachment at specific critical points. These local quality enhancements allow the clips to self-align with the grilled wall structure, maintaining assembly precision without requiring complex adjustment procedures or skilled manual intervention.

Inventive Principle:

Principle #3Local quality

3Strength

If welded metal wire couplings are used, then mechanical strength is improved, but device complexity increases

Engineering Contradiction:

Improvemechanical strengthVSAvoiddevice complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The patent combines multiple functions into the single plastic clip component: attachment, positioning, alignment, and structural reinforcement are all integrated into one element. This merging eliminates the need for separate welding operations, positioning fixtures, and alignment tools, thereby simplifying the overall device complexity while maintaining or even improving mechanical strength through the unified design.

Inventive Principle:

Principle #5Merging (Combining)

4Reliability

If traditional metal wire couplings are used, then production robustness is improved, but harmful factors increase

Engineering Contradiction:

Improveproduction robustnessVSAvoidnoise and safety hazards

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent converts the potential harm of metal-on-metal contact (noise and sharp edges) into a benefit by using plastic material that inherently eliminates these issues. The plastic clips provide a quiet, safe alternative that maintains production robustness through reliable attachment mechanisms while converting the harmful characteristics of metal couplings into beneficial properties of noise reduction and safety enhancement.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS12465013B2Coupling element for the connection between adjacent grilled walls of a pet cage

Publication Date: 2025.11.11 FERPLAST SRL

AI summary

A coupling element (10) for the connection between a first grilled wall (P′) and a second grilled wall (P″) adjacent and orthogonal to each other of a pet cage, comprising an elongated body (11) one side of which ends with an arched coupling appendage (12), and the opposite side with a head (13) comprising two further arched coupling appendages (15, 16) facing opposite sides of the body (11). Said arched appendages (12, 15, 16) define a first seat (14) and a second seat (18) for the coupling to two rods f1′, T″) forming part of the first grilled wall (P′) and a third seat (18) for coupling to a third rod (T′″) forming part of the second grilled wall (P″) to which the first wall (P) is connected. The third seat (18) is associated with an elastic tongue (19) adapted to contrastingly retain said third rod (T′″) of said second wall (P″) to which the first wall (P′) is connected.