Refrigerator Door Magnetic Lock Catch for Replaceable Decorative Plate

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Solution Overview

Problem

Existing refrigerators face challenges in replacing the door surface due to high costs and the inability to meet long-term aesthetic adjustments, and there is a risk of door surface breakage during use or transportation.

Innovation Solution

A refrigerator door with a detachable decorative door plate secured by a magnetic lock catch featuring balls that clamp the mater, allowing easy assembly and disassembly using an unlocking magnetic buckle with the same polarity as the magnetic ring.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the entire door body is replaced to change appearance or fix damage, then the appearance requirement or damage repair is satisfied, but the replacement cost increases and usage is affected

Engineering Contradiction:

Improveappearance adjustment capabilityVSAvoidreplacement cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The door assembly is divided into two independent parts: the door body and the decorative door plate. The decorative door plate can be detached and replaced independently without replacing the entire door body, thereby reducing replacement cost while maintaining appearance adaptability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The decorative function is extracted from the door body structure by using a separate decorative door plate that can be independently removed and replaced. This allows the appearance to be changed without affecting the functional door body.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If the decorative door plate is securely fixed to prevent displacement, then the connection reliability is improved, but the ease of replacement deteriorates

Engineering Contradiction:

Improveconnection reliabilityVSAvoidease of replacement

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The traditional mechanical fastening system (screws, nails, adhesives) is replaced with a magnetic field-based locking system. The magnetic lock catch uses magnetic attraction to securely hold the decorative door plate during normal use, but allows easy removal when a magnet with the same polarity is applied to overcome the magnetic force.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic force parameter can be dynamically changed by introducing a magnet with the same polarity, which reverses the magnetic interaction from attraction to repulsion. This enables the connection strength to be adjusted from strong (during use) to weak (during replacement) based on operational needs.

Inventive Principle:

Principle #35Parameter changes

3Duration of action of stationary object

If the door surface is made durable for long-term use, then the service life is extended, but the ability to meet changing aesthetic needs deteriorates

Engineering Contradiction:

Improveservice lifeVSAvoidaesthetic adjustment capability

Core Design Contradiction:

Duration of action of stationary objectVSAdaptability or versatility

Solution Approach 1:

The door system is segmented into a durable door body and a replaceable decorative door plate. The door body maintains its structural integrity and long service life, while the decorative door plate can be periodically replaced to meet changing aesthetic preferences without affecting the overall service life of the door assembly.

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

Enables quick and cost-effective replacement of the door surface, accommodating aesthetic changes and reducing the risk of damage by allowing easy installation and removal of the decorative door plate.

Implementation Method 1

a magnetic lock catch, which comprises a plurality of balls; and when the decorative door plate is assembled on the front side of the foamed door body, the mater is inserted in the magnetic lock catch, and the plurality of balls clamps the mater

Methodology Applied

Scientific EffectMagnetic force: Magnetism

Implementation Method 2

an unlocking magnetic buckle having the same magnetic polarity as that of the magnetic ring; and wherein, when the unlocking magnetic buckle is close to the magnetic ring, the magnetic ring pushes the holding frame

Methodology Applied

Scientific EffectMagnetic repulsion: Ion Repulsion/Attraction

Data Source

PatentUS12455108B2Refrigerator door with replaceable door surface

Publication Date: 2025.10.28 QINGDAO HAIER SPECIAL REFRIGERATOR CO LTD

AI summary

A refrigerator door with a replaceable door surface includes a foamed door body and a decorative door plate. A rear side of the decorative door plate is provided with a mater; a front side of the foamed door body is provided with a magnetic lock catch, which comprises a plurality of balls. By clamping the mater on the rear side of the decorative door plate by the plurality of balls of the magnetic lock catch in the foamed door body, the displacement of the decorative door plate in the front-rear direction is limited. In addition, the unlocking magnetic buckle is provided to repel with the magnetic ring, such that a locking relationship between the plurality of balls and the mater is released, thereby achieving the effect of quickly disassembling and installing the decorative door plate.