Buckle Device Resin Release Button Guide Structure

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Solution Overview

Problem

Existing buckle devices face issues where the tongue plate can get caught or collide with the frame when inserted obliquely, potentially causing damage due to the use of resin and metal components.

Innovation Solution

The buckle device incorporates protruding portions on the frame's side walls and extending portions of the release button to guide the tongue plate, preventing collisions and distributing loads, allowing for a resin release button that does not require high strength, thus reducing manufacturing costs and preventing abnormal noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a resin release button with a side wall is used to guide the tongue plate, then the tongue plate insertion is facilitated, but the side wall may be bent when the tongue plate is inserted with large force in an oblique state

Engineering Contradiction:

Improvetongue plate insertionVSAvoidside wall strength

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The patent introduces a guide portion made of metal frame as an intermediary structure between the tongue plate and the resin release button. This metal guide portion absorbs the insertion force and guides the tongue plate, protecting the resin side wall from bending while maintaining ease of insertion

Inventive Principle:

Principle #24Intermediary (Mediator)

2Speed

If the tongue plate is inserted in an oblique state, then the insertion speed may be increased, but the tongue plate may collide with the metal frame causing damage

Engineering Contradiction:

Improveinsertion speedVSAvoidcollision damage

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent designs the metal frame with a guide portion that protrudes into the tongue plate insertion path before the tongue plate reaches it. This preliminary guide structure corrects the oblique tongue plate orientation in advance, preventing collision with the frame body and enabling faster insertion without damage risk

Inventive Principle:

Principle #10Preliminary action

3Strength

If a metal frame with guide portion is used, then the structural strength is improved, but the manufacturing cost increases

Engineering Contradiction:

Improveframe strengthVSAvoidmanufacturing cost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent applies metal material only to the critical guide portion where strength is needed to withstand tongue plate insertion forces, while the rest of the release button structure can be made of cheaper resin material. This localized use of metal reduces overall manufacturing cost while maintaining necessary structural strength

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10455903B2Buckle device

Publication Date: 2019.10.29 ASHIMORI INDS CO LTD

AI summary

A buckle device including: a tongue plate; and a buckle main body configured to be engaged with the tongue plate, the buckle main body including: a cover having a tongue plate guide portion; a resin release button forming a tongue plate insertion port between the tongue plate guide portion and the release button; and a frame configured to slidably support the release button and having a bottom wall and a pair of side walls, wherein protruding portions protruding inward so as to overlap with the tongue plate inserted from the tongue plate insertion port are provided on end portions of the pair of side walls of the frame on the side of the tongue plate insertion port, respectively, and wherein the release button has a front wall and at least one extending portion extending from the front wall through a space between the protruding portions and the bottom wall.