Interchangeable Tool Carabiner Gate Assembly for Belt Attachment

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Solution Overview

Problem

Existing tool carabiners require replacement of the entire device for changing the gate mechanism, which is unsafe and impractical due to non-removable pins, and lack the ability to individually replace snap fasteners without disposing of other components.

Innovation Solution

A tool carabiner design with a detachable interchangeable gate assembly and snap fasteners, allowing independent replacement of the gate and snap fasteners without safety concerns, using a rail system or screw connections for secure attachment to a belt.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the gate is permanently hinged to the main part by a non-removable pin, then the carabiner structure is simple and robust, but the gate cannot be replaced individually and manual pin removal creates safety risks

Engineering Contradiction:
Improvegate replaceabilityVSAvoidattachment mechanism complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The gate assembly is segmented into separable components: the gate itself, the connecting piece, and the attachment mechanism to the main part. This allows the gate to be replaced independently by removing only the connecting piece from the main part, without affecting the gate's internal pin structure. The segmentation enables individual component replacement while maintaining overall structural integrity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The connecting piece is extracted as a separate intermediate component between the gate and the main part. This connecting piece can be detached from the main part while the gate remains attached to the connecting piece via its original pin. This extraction allows gate replacement without manipulating the gate's internal pin, eliminating safety risks while enabling adaptability.

Inventive Principle:
Principle #2Taking out (Extraction)

2Adaptability or versatility

If the entire tool carabiner must be replaced to change the gate mechanism, then component reliability is maintained, but material waste increases and cost rises

Engineering Contradiction:
Improvesnap fastener interchangeabilityVSAvoidcomponent waste
Core Design Contradiction:
Adaptability or versatilityVSLoss of substance

Solution Approach 1:

The snap fastener system is segmented into the main part with strap mounting means and the separate connecting piece with gate. This segmentation allows the main part to be retained and reused when only the gate needs replacement, significantly reducing material waste. The connecting piece serves as the interchangeable element that can be removed and replaced independently.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

When replacing the gate, only the connecting piece is discarded or replaced, while the main part is recovered and reused. This selective replacement approach minimizes material loss and reduces waste compared to replacing the entire carabiner assembly. The main part's strap mounting means and structural components are preserved for continued use.

Inventive Principle:
Principle #34Discarding and recovering

3Ease of operation

If the gate and strap mounting means are integrated in a single piece, then manufacturing is simpler, but the gate cannot be replaced independently of the strap attachment

Engineering Contradiction:
Improveindependent replacement capabilityVSAvoidmulti-component assembly complexity
Core Design Contradiction:
Ease of operationVSEase of manufacture

Solution Approach 1:

The carabiner is segmented into distinct functional modules: the main part with strap mounting means, and the connecting piece with gate. This segmentation enables independent replacement of the gate assembly from the strap attachment system. The connecting piece acts as an interface that can be detached from the main part while leaving the strap mounting means intact and reusable.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The main part is designed with universal strap mounting means that can accommodate different gate configurations. The connecting piece serves multiple functions: attaching the gate to the main part and providing a standardized interface for replacement. This multi-functionality allows the main part to work with different gate types while maintaining ease of manufacture through standardized components.

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

Data Source

PatentEP4450837B1Tool carabiner for securing tools to a strap
Publication Date: 2026.02.25 TEUFELBERGER FIBER ROPE
  • EP4450837B1 patent drawingFigure 1~3
  • EP4450837B1 patent drawingFigure 4~6

AI summary

The invention relates to a tool carabiner (1) for securing tools to a belt, comprising a main part (2) open on one side and a pivotably mounted snap (4) for closing and opening the main part (2), wherein the tool carabiner (1) further comprises a snap interchangeable part (3) with a connecting part (10), wherein the snap (4) is permanently hinged to the connecting part (10), and wherein the connecting part (10) is detachably connectable to the main part (2) in order to mount the snap interchangeable part (3) interchangeably on the main part (2).