Seat Belt Webbing Guide Rib Integration

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Solution Overview

Problem

Conventional seat belt webbing guides experience noise issues due to friction between the mounting bolt and the webbing guide, and they require additional components like bushings to reduce this friction, increasing complexity.

Innovation Solution

A seat belt webbing guide with a rib formed as a single unit with the main body, extending inwardly in a radial direction through the mounting bolt hole, eliminating the need for bushings and minimizing contact surfaces to reduce noise and enhance structural strength.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a bushing is installed on the webbing guide to reduce friction between the mounting bolt and webbing guide, then noise is reduced, but the number of components increases and device complexity increases

Engineering Contradiction:

ImprovenoiseVSAvoidnumber of components

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The rib is integrated directly into the webbing guide body as a single unit, eliminating the need for a separate bushing component. This merging of functions reduces the number of parts while maintaining the noise reduction benefit through the rib's friction-reducing geometry

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The rib acts as an intermediary structural feature between the mounting bolt and webbing guide body, providing a geometry that reduces friction and noise without requiring an additional bushing component. The rib's protruding shape creates a beneficial contact interface

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If a bushing is installed to reduce friction between mounting bolt and webbing guide, then noise is reduced, but manufacturing complexity and assembly steps increase

Engineering Contradiction:

ImprovenoiseVSAvoidmanufacturing complexity

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The rib is formed as an integral part of the webbing guide body through a single molding process, eliminating the need for separate bushing manufacturing and assembly operations. This reduces manufacturing complexity while achieving the same noise reduction function

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If the webbing guide is mounted with a mounting bolt, then the webbing guide is fixed in the vehicle, but friction between the bolt and webbing guide causes noise

Engineering Contradiction:

Improvemounting stabilityVSAvoidnoise

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The rib serves as a geometric intermediary between the mounting bolt and webbing guide body that reduces friction during rotation and mounting operations. The protruding rib shape creates a contact interface that minimizes noise while maintaining secure mounting

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP2892766B1Seat belt webbing guide

Publication Date: 2017.10.04 AUTOLIV DEV AB

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AI summary

Provided is a seat belt webbing guide comprising a main body including a slot through which seat belt webbing passes and a through hole through which a mounting bolt passes, wherein the webbing guide includes at least one rib that is formed as a single unit with the main body along a circumferential surface of the through hole, wherein the at least one rib extends inwardly in a radial direction of the through hole to a central axis of the through hole, and wherein at least a portion of the at least one rib is protruded from a surface of the main body toward a head of the mounting bolt.