Bridge-Adjusting Belt Buckle With Spring-Pawl Self-Locking

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Solution Overview

Problem

Existing belt buckles suffer from complex structures, poor durability of elastic elements, and cumbersome operation, while also lacking diverse and aesthetically appealing designs.

Innovation Solution

A bridge-adjustment fixing belt buckle design incorporating a spring-based elastic force and a raised pawl for quick and stable belt tension adjustment, featuring a pivotally arranged first bridge with a spring for position restoration and a decorative panel control for intuitive operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional elastic elements and pawl mechanisms are used in belt buckles, then self-locking function is achieved, but the structure becomes complex and durability decreases

Engineering Contradiction:
Improveself-locking functionVSAvoidstructure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the elastic element and pawl into an integrated bridge component. The bridge serves dual functions: it acts as the elastic element that presses the pawl against the belt, and simultaneously provides the pawl mechanism for self-locking. This merging eliminates separate components and simplifies the overall structure while maintaining the self-locking function.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The bridge is designed as a multi-functional component that performs multiple roles: it provides elastic pressing force through its material properties, acts as a lever arm for the pawl, and serves as a structural support element. This multi-functionality reduces the total number of parts needed in the belt buckle system.

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

2Reliability

If traditional belt adjustment mechanisms are used, then belt fixation is achieved, but operation becomes cumbersome and time-consuming

Engineering Contradiction:
Improvebelt fixationVSAvoidadjustment operation
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The bridge-pawl mechanism is designed to automatically engage and disengage based on the natural movement of the belt. When the belt is inserted or adjusted, the bridge naturally presses the pawl against the belt teeth, creating automatic fixation without requiring manual intervention. The elastic force continuously maintains this self-service locking action.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The bridge is designed with dynamic characteristics, allowing it to flex and adapt to different belt positions and tensions. The elastic element enables the bridge to dynamically adjust its pressing force on the pawl, ensuring reliable fixation across various operating conditions while maintaining smooth adjustment capability.

Inventive Principle:
Principle #15Dynamics

3Adaptability or versatility

If multiple components are used in belt buckle design, then functional requirements are met, but manufacturing cost and assembly complexity increase

Engineering Contradiction:
Improvefunctional requirementsVSAvoidmanufacturing complexity
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent merges multiple functional components into the single bridge structure. The bridge integrates the elastic element, the pawl support, and the pressing mechanism into one manufacturable part. This consolidation reduces the number of separate manufacturing processes and assembly steps required, while still meeting all functional requirements for belt fixation and adjustment.

Inventive Principle:
Principle #5Merging (Combining)

4Reliability

If conventional belt buckle designs are used, then basic fixation is provided, but aesthetic diversity and shape changeability are limited

Engineering Contradiction:
Improvefixation functionVSAvoidappearance design diversity
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The bridge is designed as a separable component that can be independently styled and configured. The bridge can be detached or replaced without affecting the core fixation mechanism, allowing for various aesthetic designs, materials, and decorative elements to be applied to the bridge portion while maintaining the functional integrity of the pawl-belt interaction.

Inventive Principle:
Principle #1Segmentation

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 simplifies belt adjustment by allowing easy rotation of the first bridge to disengage the pawl, enhances durability through reduced parts, and offers customizable aesthetics, making it suitable for various belt materials.

Implementation Method 1

a spring is arranged between the first bridge and the belt buckle seat for elastic position restoration of the first bridge and the raised pawl

Methodology Applied
Scientific EffectElastic force: Elasticity

Data Source

PatentUS20260000159A1Bridge-adjustment fixing belt buckle
Publication Date: 2026.01.01 CHEN HSI HSIN
  • US20260000159A1 patent drawing
  • US20260000159A1 patent drawing
  • US20260000159A1 patent drawing

AI summary

A bridge-adjustment fixing belt buckle is provided, aiming to improve difficulty of adjustment and unstable fixing. A first bridge, which is rotatable, is arranged in conjunction with a spring and a raised pawl to achieve quick and stable fixing and tightness adjustment of a belt. To avoid accidental touch, the bridge is arranged to drive the raised pawl to disengage from the belt, and automatic position restoration is achieved by the elastic force of the spring. Outside appearance change made with an auxiliary bridge may change the position of triggering the raised pawl to provide flexibility for expansion of mechanical design and also maintaining smooth feel of adjustment. Also, a combination of a main limiting frame, a decorative panel control, and a connecting seat can be used to achieve horizontal push type operation, and a more accurate and stable tightness adjustment is achieved in conjunction with the belt ratchet.