Tool Belt Buckle with Integrated Locking and Step-less Adjustment

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Solution Overview

Problem

Existing tool belts with buckles are inconvenient for users, especially when wearing gloves, as they often have complex designs that hinder free movement and are difficult to operate quickly in emergency situations, and lack efficient length adjustment mechanisms.

Innovation Solution

A tool belt buckle design with the locking mechanism and length adjustment mechanism integrated within the female part, featuring a snap-lock latch system and step-less belt adjustment, allowing for easy operation even with gloves and minimizing the risk of unintentional release.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If large interface features (buttons, levers, pins) are used in the belt buckle, then the locking mechanism becomes more reliable, but the design becomes inconvenient and prevents free movement

Engineering Contradiction:
Improvelocking mechanism reliabilityVSAvoidease of operation
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The buckle is divided into a male part and a female part with separate locking mechanisms. The male part contains a latch plate while the female part contains the locking mechanism and length adjustment mechanism, allowing each part to be optimized independently for both reliability and ease of operation.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Instead of having the locking mechanism on the male part as in traditional buckles, the locking mechanism is placed on the female part. This inversion allows the male part to have a simpler latch plate design that is easier to insert and manipulate, while the female part provides the secure locking action.

Inventive Principle:
Principle #13The other way round (Inversion)

2Reliability

If complex buckle designs are used, then the locking mechanism becomes more secure, but the user cannot manoeuvre easily when wearing gloves

Engineering Contradiction:
Improvesecurity of lockingVSAvoidease of manoeuvring with gloves
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The length adjustment mechanism is extracted from the traditional buckle design and integrated into the female part as a separate function. This allows the locking and adjustment functions to be independent, simplifying the operation required for each function while maintaining security.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The belt strap forms a loop around a rod in the female part, creating a self-adjusting mechanism. The user can easily manipulate the belt strap to adjust length without requiring complex external mechanisms, making it glove-friendly while maintaining secure locking.

Inventive Principle:
Principle #25Self-service

3Ease of operation

If the locking mechanism and length adjustment mechanism are placed separately, then the design becomes more complex, but the user can distinguish and operate the mechanisms more easily

Engineering Contradiction:
Improveease of distinction between mechanismsVSAvoidstructural complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

Both the locking mechanism and the length adjustment mechanism are merged into the female part of the buckle. This consolidation creates a single integrated component that houses both functions, reducing the overall number of separate parts while maintaining clear operational distinction between the two functions through separate access points and mechanisms.

Inventive Principle:
Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The design provides a smooth, compact, and safe operation of the tool belt buckle, allowing users to easily adjust the belt length and disconnect it quickly, enhancing usability and safety, especially when wearing protective gloves.

Implementation Method 1

the latch plate is configured to be connected to the female interface when the latch plate is moved over the connection ramp, thereby pressing the connection ramp in a latch release direction transversal to an axis of insertion of the latch plate into the female interface and the connection ramp snaps back into a latch locking direction opposite to the latch release direction

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP3716808B1Tool belt
Publication Date: 2022.12.28 HUSQVARNA AB
  • EP3716808B1 patent drawingFigure 1
  • EP3716808B1 patent drawingFigure 2A~2B
  • EP3716808B1 patent drawingFigure 3A~3B

AI summary

A tool belt (1) comprises a belt strap (2) and a belt buckle (3), wherein the belt buckle (3) comprises a male (5) and a female part (7). The male part (5) comprises a latch plate (27) and the female part (7) comprises a female interface (9) for receiving the latch plate (27). The latch plate (27) is attached to a first end (2a) of the belt strap (2) and the female part (7) is attached to a second end (2b) of the belt strap (2), and the female part (7) comprises a locking mechanism (15) adapted for connection and disconnection of the latch plate (27) to or from the female interface (9), and a length adjustment mechanism (17) adapted for adjustment of the length of the belt strap (2).